127648521 has 64 divisors (see below), whose sum is σ = 253962240. Its totient is φ = 61197120.

The previous prime is 127648519. The next prime is 127648531. The reversal of 127648521 is 125846721.

127648521 is a `hidden beast` number, since 1 + 2 + 7 + 648 + 5 + 2 + 1 = 666.

It is not a de Polignac number, because 127648521 - 2¹ = 127648519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127648501) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24666 + ... + 29388.

It is an arithmetic number, because the mean of its divisors is an integer number (3968160).

Almost surely, 2^127648521 is an apocalyptic number.

127648521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

127648521 is a deficient number, since it is larger than the sum of its proper divisors (126313719).

127648521 is a wasteful number, since it uses less digits than its factorization.

127648521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4763 (or 4757 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 127648521 is about 11298.1644969437. The cubic root of 127648521 is about 503.5067098099.

The spelling of 127648521 in words is "one hundred twenty-seven million, six hundred forty-eight thousand, five hundred twenty-one".