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1247133213 = 33169327283
BaseRepresentation
bin100101001010101…
…1011111000011101
310012220200221011000
41022111123320131
510023231230323
6323430220513
742622312614
oct11225337035
93186627130
101247133213
1158aa79707
122a97b4739
1316b4b7a61
14bb8bc87b
157474ae43
hex4a55be1d

1247133213 has 16 divisors (see below), whose sum is σ = 1848763840. Its totient is φ = 830900592.

The previous prime is 1247133149. The next prime is 1247133221. The reversal of 1247133213 is 3123317421.

It is a happy number.

It is not a de Polignac number, because 1247133213 - 26 = 1247133149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247133253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32070 + ... + 59352.

It is an arithmetic number, because the mean of its divisors is an integer number (115547740).

Almost surely, 21247133213 is an apocalyptic number.

It is an amenable number.

1247133213 is a deficient number, since it is larger than the sum of its proper divisors (601630627).

1247133213 is a wasteful number, since it uses less digits than its factorization.

1247133213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28985 (or 28979 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 1247133213 is about 35314.7732967380. The cubic root of 1247133213 is about 1076.3932072790.

The spelling of 1247133213 in words is "one billion, two hundred forty-seven million, one hundred thirty-three thousand, two hundred thirteen".

Divisors: 1 3 9 27 1693 5079 15237 27283 45711 81849 245547 736641 46190119 138570357 415711071 1247133213