127564457 has 4 divisors (see below), whose sum is σ = 128693460. Its totient is φ = 126435456.

The previous prime is 127564441. The next prime is 127564477. The reversal of 127564457 is 754465721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 754465721 = 79 ⋅9550199.

It can be written as a sum of positive squares in 2 ways, for example, as 49224256 + 78340201 = 7016^2 + 8851^2 .

It is a cyclic number.

It is not a de Polignac number, because 127564457 - 2⁴ = 127564441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127564477) 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, 564332 + ... + 564557.

It is an arithmetic number, because the mean of its divisors is an integer number (32173365).

Almost surely, 2^127564457 is an apocalyptic number.

It is an amenable number.

127564457 is a deficient number, since it is larger than the sum of its proper divisors (1129003).

127564457 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 8 representation: 127564457 = (746475251)₈.

127564457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129002.

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

The square root of 127564457 is about 11294.4436339290. The cubic root of 127564457 is about 503.3961560208.

The spelling of 127564457 in words is "one hundred twenty-seven million, five hundred sixty-four thousand, four hundred fifty-seven".