127445657 has 2 divisors, whose sum is σ = 127445658. Its totient is φ = 127445656.

The previous prime is 127445629. The next prime is 127445687. The reversal of 127445657 is 756544721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117592336 + 9853321 = 10844^2 + 3139^2 .

It is a cyclic number.

It is not a de Polignac number, because 127445657 - 2¹⁴ = 127429273 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (127445687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63722828 + 63722829.

It is an arithmetic number, because the mean of its divisors is an integer number (63722829).

Almost surely, 2^127445657 is an apocalyptic number.

It is an amenable number.

127445657 is a deficient number, since it is larger than the sum of its proper divisors (1).

127445657 is an equidigital number, since it uses as much as digits as its factorization.

127445657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 235200, while the sum is 41.

The square root of 127445657 is about 11289.1831856871. The cubic root of 127445657 is about 503.2398375623.

The spelling of 127445657 in words is "one hundred twenty-seven million, four hundred forty-five thousand, six hundred fifty-seven".