127900665 has 12 divisors (see below), whose sum is σ = 221694564. Its totient is φ = 68213664.

The previous prime is 127900589. The next prime is 127900679. The reversal of 127900665 is 566009721.

It can be written as a sum of positive squares in 2 ways, for example, as 62678889 + 65221776 = 7917^2 + 8076^2 .

It is not a de Polignac number, because 127900665 - 2¹² = 127896569 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1421074 + ... + 1421163.

It is an arithmetic number, because the mean of its divisors is an integer number (18474547).

Almost surely, 2^127900665 is an apocalyptic number.

127900665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

127900665 is a deficient number, since it is larger than the sum of its proper divisors (93793899).

127900665 is a wasteful number, since it uses less digits than its factorization.

127900665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2842248 (or 2842245 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 127900665 is about 11309.3176186718. The cubic root of 127900665 is about 503.8380172007.

The spelling of 127900665 in words is "one hundred twenty-seven million, nine hundred thousand, six hundred sixty-five".