127131321 has 16 divisors (see below), whose sum is σ = 179712000. Its totient is φ = 79665408.

The previous prime is 127131317. The next prime is 127131343. The reversal of 127131321 is 123131721.

It is a happy number.

It is not a de Polignac number, because 127131321 - 2² = 127131317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127131311) 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, 64255 + ... + 66203.

It is an arithmetic number, because the mean of its divisors is an integer number (11232000).

Almost surely, 2^127131321 is an apocalyptic number.

It is an amenable number.

127131321 is a deficient number, since it is larger than the sum of its proper divisors (52580679).

127131321 is a wasteful number, since it uses less digits than its factorization.

127131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3248.

The product of its digits is 252, while the sum is 21.

The square root of 127131321 is about 11275.2525914057. The cubic root of 127131321 is about 502.8257613938.

The spelling of 127131321 in words is "one hundred twenty-seven million, one hundred thirty-one thousand, three hundred twenty-one".