1251253345 has 16 divisors (see below), whose sum is σ = 1545667200. Its totient is φ = 971841024.

The previous prime is 1251253327. The next prime is 1251253441. The reversal of 1251253345 is 5433521521.

It is a cyclic number.

It is not a de Polignac number, because 1251253345 - 2⁵ = 1251253313 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 18481 + ... + 53329.

It is an arithmetic number, because the mean of its divisors is an integer number (96604200).

Almost surely, 2^1251253345 is an apocalyptic number.

It is an amenable number.

1251253345 is a deficient number, since it is larger than the sum of its proper divisors (294413855).

1251253345 is a wasteful number, since it uses less digits than its factorization.

1251253345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35064.

The product of its digits is 18000, while the sum is 31.

The square root of 1251253345 is about 35373.0595934251. The cubic root of 1251253345 is about 1077.5772580769.

Adding to 1251253345 its reverse (5433521521), we get a palindrome (6684774866).

The spelling of 1251253345 in words is "one billion, two hundred fifty-one million, two hundred fifty-three thousand, three hundred forty-five".