1252961815 has 16 divisors (see below), whose sum is σ = 1718922240. Its totient is φ = 858886560.

The previous prime is 1252961789. The next prime is 1252961881. The reversal of 1252961815 is 5181692521.

It is not a de Polignac number, because 1252961815 - 2⁷ = 1252961687 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201300 + ... + 207430.

It is an arithmetic number, because the mean of its divisors is an integer number (107432640).

Almost surely, 2^1252961815 is an apocalyptic number.

1252961815 is a deficient number, since it is larger than the sum of its proper divisors (465960425).

1252961815 is an equidigital number, since it uses as much as digits as its factorization.

1252961815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11982.

The product of its digits is 43200, while the sum is 40.

The square root of 1252961815 is about 35397.2006661544. The cubic root of 1252961815 is about 1078.0674788495.

The spelling of 1252961815 in words is "one billion, two hundred fifty-two million, nine hundred sixty-one thousand, eight hundred fifteen".