1251613332 has 36 divisors (see below), whose sum is σ = 3211027456. Its totient is φ = 410976720.

The previous prime is 1251613331. The next prime is 1251613343. The reversal of 1251613332 is 2333161521.

1251613332 is a `hidden beast` number, since 12 + 5 + 1 + 613 + 3 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 1251613296 and 1251613305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251613331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 257044 + ... + 261867.

Almost surely, 2^1251613332 is an apocalyptic number.

1251613332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1251613332 is an abundant number, since it is smaller than the sum of its proper divisors (1959414124).

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

1251613332 is a wasteful number, since it uses less digits than its factorization.

1251613332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518988 (or 518983 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 1251613332 is about 35378.1476620809. The cubic root of 1251613332 is about 1077.6805882327.

Adding to 1251613332 its reverse (2333161521), we get a palindrome (3584774853).

The spelling of 1251613332 in words is "one billion, two hundred fifty-one million, six hundred thirteen thousand, three hundred thirty-two".