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1213472 = 25132917
BaseRepresentation
bin100101000010000100000
32021122120102
410220100200
5302312342
642001532
713212551
oct4502040
92248512
101213472
11759777
124a62a8
13336440
14238328
1518e832
hex128420

1213472 has 24 divisors (see below), whose sum is σ = 2573676. Its totient is φ = 559872.

The previous prime is 1213469. The next prime is 1213481. The reversal of 1213472 is 2743121.

It can be written as a sum of positive squares in 2 ways, for example, as 1175056 + 38416 = 1084^2 + 196^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1043 + ... + 1874.

21213472 is an apocalyptic number.

It is an amenable number.

1213472 is an abundant number, since it is smaller than the sum of its proper divisors (1360204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213472 is a wasteful number, since it uses less digits than its factorization.

1213472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2940 (or 2932 counting only the distinct ones).

The product of its digits is 336, while the sum is 20.

The square root of 1213472 is about 1101.5770513223. The cubic root of 1213472 is about 106.6620484112.

Adding to 1213472 its reverse (2743121), we get a palindrome (3956593).

The spelling of 1213472 in words is "one million, two hundred thirteen thousand, four hundred seventy-two".

Divisors: 1 2 4 8 13 16 26 32 52 104 208 416 2917 5834 11668 23336 37921 46672 75842 93344 151684 303368 606736 1213472