1252790165 has 32 divisors (see below), whose sum is σ = 1683614592. Its totient is φ = 887040000.

The previous prime is 1252790117. The next prime is 1252790171. The reversal of 1252790165 is 5610972521.

It is a happy number.

It is not a de Polignac number, because 1252790165 - 2²² = 1248595861 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 947705 + ... + 949025.

It is an arithmetic number, because the mean of its divisors is an integer number (52612956).

Almost surely, 2^1252790165 is an apocalyptic number.

It is an amenable number.

1252790165 is a deficient number, since it is larger than the sum of its proper divisors (430824427).

1252790165 is a wasteful number, since it uses less digits than its factorization.

1252790165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 1252790165 is about 35394.7759563470. The cubic root of 1252790165 is about 1078.0182465075.

The spelling of 1252790165 in words is "one billion, two hundred fifty-two million, seven hundred ninety thousand, one hundred sixty-five".