1252901266665 has 16 divisors (see below), whose sum is σ = 2017410451008. Its totient is φ = 663957867456.

The previous prime is 1252901266663. The next prime is 1252901266699. The reversal of 1252901266665 is 5666621092521.

It is not a de Polignac number, because 1252901266665 - 2¹ = 1252901266663 is a prime.

It is a super-2 number, since 2×1252901266665² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1252901266663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266006407 + ... + 266011116.

It is an arithmetic number, because the mean of its divisors is an integer number (126088153188).

Almost surely, 2^{1252901266665} is an apocalyptic number.

1252901266665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1252901266665 is a deficient number, since it is larger than the sum of its proper divisors (764509184343).

1252901266665 is a wasteful number, since it uses less digits than its factorization.

1252901266665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532017688.

The product of its (nonzero) digits is 2332800, while the sum is 51.

The spelling of 1252901266665 in words is "one trillion, two hundred fifty-two billion, nine hundred one million, two hundred sixty-six thousand, six hundred sixty-five".