1251662996 has 24 divisors (see below), whose sum is σ = 2207229696. Its totient is φ = 621039200.

The previous prime is 1251662977. The next prime is 1251663011. The reversal of 1251662996 is 6992661521.

It is a self number, because there is not a number n which added to its sum of digits gives 1251662996.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531221 + ... + 533571.

It is an arithmetic number, because the mean of its divisors is an integer number (91967904).

Almost surely, 2^1251662996 is an apocalyptic number.

It is an amenable number.

1251662996 is a deficient number, since it is larger than the sum of its proper divisors (955566700).

1251662996 is a wasteful number, since it uses less digits than its factorization.

1251662996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319 (or 3317 counting only the distinct ones).

The product of its digits is 349920, while the sum is 47.

The square root of 1251662996 is about 35378.8495573273. The cubic root of 1251662996 is about 1077.6948421612.

The spelling of 1251662996 in words is "one billion, two hundred fifty-one million, six hundred sixty-two thousand, nine hundred ninety-six".