127891025 has 12 divisors (see below), whose sum is σ = 159476400. Its totient is φ = 101737680.

The previous prime is 127891019. The next prime is 127891037. The reversal of 127891025 is 520198721.

It is not a de Polignac number, because 127891025 - 2¹⁸ = 127628881 is a prime.

It is a super-2 number, since 2×127891025² = 32712228551101250, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9815 + ... + 18764.

It is an arithmetic number, because the mean of its divisors is an integer number (13289700).

Almost surely, 2^127891025 is an apocalyptic number.

It is an amenable number.

127891025 is a deficient number, since it is larger than the sum of its proper divisors (31585375).

127891025 is a wasteful number, since it uses less digits than its factorization.

127891025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28768 (or 28763 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 127891025 is about 11308.8914133968. The cubic root of 127891025 is about 503.8253586256.

The spelling of 127891025 in words is "one hundred twenty-seven million, eight hundred ninety-one thousand, twenty-five".