1251163416 has 64 divisors (see below), whose sum is σ = 3329272800. Its totient is φ = 390463488.

The previous prime is 1251163411. The next prime is 1251163423. The reversal of 1251163416 is 6143611521.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251163411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70800 + ... + 86688.

Almost surely, 2^1251163416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1251163416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1664636400).

1251163416 is an abundant number, since it is smaller than the sum of its proper divisors (2078109384).

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

1251163416 is a wasteful number, since it uses less digits than its factorization.

1251163416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16108 (or 16104 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 1251163416 is about 35371.7884195866. The cubic root of 1251163416 is about 1077.5514418910.

Adding to 1251163416 its reverse (6143611521), we get a palindrome (7394774937).

The spelling of 1251163416 in words is "one billion, two hundred fifty-one million, one hundred sixty-three thousand, four hundred sixteen".