127218025 has 24 divisors (see below), whose sum is σ = 176756544. Its totient is φ = 90014400.

The previous prime is 127217989. The next prime is 127218071. The reversal of 127218025 is 520812721.

It is not a de Polignac number, because 127218025 - 2⁷ = 127217897 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 127217984 and 127218002.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3924 + ... + 16426.

It is an arithmetic number, because the mean of its divisors is an integer number (7364856).

Almost surely, 2^127218025 is an apocalyptic number.

It is an amenable number.

127218025 is a deficient number, since it is larger than the sum of its proper divisors (49538519).

127218025 is a wasteful number, since it uses less digits than its factorization.

127218025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12561 (or 12556 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 127218025 is about 11279.0968166782. The cubic root of 127218025 is about 502.9400450524.

The spelling of 127218025 in words is "one hundred twenty-seven million, two hundred eighteen thousand, twenty-five".