127157540 has 12 divisors (see below), whose sum is σ = 267030876. Its totient is φ = 50863008.

The previous prime is 127157539. The next prime is 127157543. The reversal of 127157540 is 45751721.

It can be written as a sum of positive squares in 2 ways, for example, as 89605156 + 37552384 = 9466^2 + 6128^2 .

It is a junction number, because it is equal to n+sod(n) for n = 127157497 and 127157506.

It is not an unprimeable number, because it can be changed into a prime (127157543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3178919 + ... + 3178958.

It is an arithmetic number, because the mean of its divisors is an integer number (22252573).

Almost surely, 2^127157540 is an apocalyptic number.

127157540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127157540 is an abundant number, since it is smaller than the sum of its proper divisors (139873336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

127157540 is a wasteful number, since it uses less digits than its factorization.

127157540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6357886 (or 6357884 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 127157540 is about 11276.4152105179. The cubic root of 127157540 is about 502.8603258696.

The spelling of 127157540 in words is "one hundred twenty-seven million, one hundred fifty-seven thousand, five hundred forty".