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1212054013 = 41269109897
BaseRepresentation
bin100100000111110…
…0111100111111101
310010110200201112101
41020033213213331
54440241212023
6320134305101
742015201112
oct11017474775
93113621471
101212054013
1157219a135
12299ab8191
13164154c31
14b6d8a909
157161c1ad
hex483e79fd

1212054013 has 8 divisors (see below), whose sum is σ = 1246243320. Its totient is φ = 1178085120.

The previous prime is 1212053971. The next prime is 1212054017. The reversal of 1212054013 is 3104502121.

It can be written as a sum of positive squares in 4 ways, for example, as 106956964 + 1105097049 = 10342^2 + 33243^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1212054013 - 29 = 1212053501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212054017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43920 + ... + 65977.

It is an arithmetic number, because the mean of its divisors is an integer number (155780415).

Almost surely, 21212054013 is an apocalyptic number.

It is an amenable number.

1212054013 is a deficient number, since it is larger than the sum of its proper divisors (34189307).

1212054013 is a wasteful number, since it uses less digits than its factorization.

1212054013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110207.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1212054013 is about 34814.5661038595. The cubic root of 1212054013 is about 1066.2048603250.

Adding to 1212054013 its reverse (3104502121), we get a palindrome (4316556134).

The spelling of 1212054013 in words is "one billion, two hundred twelve million, fifty-four thousand, thirteen".

Divisors: 1 41 269 11029 109897 4505777 29562293 1212054013