127989025 has 12 divisors (see below), whose sum is σ = 159132672. Its totient is φ = 102116240.

The previous prime is 127989019. The next prime is 127989047. The reversal of 127989025 is 520989721.

It is not a de Polignac number, because 127989025 - 2⁷ = 127988897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2892 + ... + 16258.

It is an arithmetic number, because the mean of its divisors is an integer number (13261056).

Almost surely, 2^127989025 is an apocalyptic number.

It is an amenable number.

127989025 is a deficient number, since it is larger than the sum of its proper divisors (31143647).

127989025 is a wasteful number, since it uses less digits than its factorization.

127989025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13760 (or 13755 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 127989025 is about 11313.2234575297. The cubic root of 127989025 is about 503.9540157613.

The spelling of 127989025 in words is "one hundred twenty-seven million, nine hundred eighty-nine thousand, twenty-five".