127372681 has 4 divisors (see below), whose sum is σ = 129531600. Its totient is φ = 125213764.

The previous prime is 127372673. The next prime is 127372709. The reversal of 127372681 is 186273721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 186273721 = 43 ⋅4331947.

It is a cyclic number.

It is not a de Polignac number, because 127372681 - 2³ = 127372673 is a prime.

It is a super-2 number, since 2×127372681² = 32447599730255522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 127372681.

It is not an unprimeable number, because it can be changed into a prime (127372631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1079371 + ... + 1079488.

It is an arithmetic number, because the mean of its divisors is an integer number (32382900).

Almost surely, 2^127372681 is an apocalyptic number.

It is an amenable number.

127372681 is a deficient number, since it is larger than the sum of its proper divisors (2158919).

127372681 is an equidigital number, since it uses as much as digits as its factorization.

127372681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158918.

The product of its digits is 28224, while the sum is 37.

The square root of 127372681 is about 11285.9506024083. The cubic root of 127372681 is about 503.1437667009.

The spelling of 127372681 in words is "one hundred twenty-seven million, three hundred seventy-two thousand, six hundred eighty-one".