1250665165 has 16 divisors (see below), whose sum is σ = 1571270400. Its totient is φ = 954382912.

The previous prime is 1250665133. The next prime is 1250665183. The reversal of 1250665165 is 5615660521.

It is a cyclic number.

It is not a de Polignac number, because 1250665165 - 2⁵ = 1250665133 is a prime.

It is a super-3 number, since 3×1250665165³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39925 + ... + 63994.

It is an arithmetic number, because the mean of its divisors is an integer number (98204400).

Almost surely, 2^1250665165 is an apocalyptic number.

It is an amenable number.

1250665165 is a deficient number, since it is larger than the sum of its proper divisors (320605235).

1250665165 is a wasteful number, since it uses less digits than its factorization.

1250665165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104036.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 1250665165 is about 35364.7446618804. The cubic root of 1250665165 is about 1077.4083850739.

The spelling of 1250665165 in words is "one billion, two hundred fifty million, six hundred sixty-five thousand, one hundred sixty-five".