127121564 has 24 divisors (see below), whose sum is σ = 225696240. Its totient is φ = 62643456.

The previous prime is 127121557. The next prime is 127121567. The reversal of 127121564 is 465121721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127121567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97364 + ... + 98660.

It is an arithmetic number, because the mean of its divisors is an integer number (9404010).

Almost surely, 2^127121564 is an apocalyptic number.

It is an amenable number.

127121564 is a deficient number, since it is larger than the sum of its proper divisors (98574676).

127121564 is a wasteful number, since it uses less digits than its factorization.

127121564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637 (or 1635 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 127121564 is about 11274.8199098700. The cubic root of 127121564 is about 502.8128975392.

The spelling of 127121564 in words is "one hundred twenty-seven million, one hundred twenty-one thousand, five hundred sixty-four".