1251616367 has 4 divisors (see below), whose sum is σ = 1252768896. Its totient is φ = 1250463840.

The previous prime is 1251616349. The next prime is 1251616391. The reversal of 1251616367 is 7636161521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1251616367 - 2⁸ = 1251616111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1251616367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251616337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574634 + ... + 576807.

It is an arithmetic number, because the mean of its divisors is an integer number (313192224).

Almost surely, 2^1251616367 is an apocalyptic number.

1251616367 is a deficient number, since it is larger than the sum of its proper divisors (1152529).

1251616367 is a wasteful number, since it uses less digits than its factorization.

1251616367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152528.

The product of its digits is 45360, while the sum is 38.

The square root of 1251616367 is about 35378.1905557647. The cubic root of 1251616367 is about 1077.6814593105.

Adding to 1251616367 its reverse (7636161521), we get a palindrome (8887777888).

The spelling of 1251616367 in words is "one billion, two hundred fifty-one million, six hundred sixteen thousand, three hundred sixty-seven".