125255421 has 12 divisors (see below), whose sum is σ = 182790972. Its totient is φ = 82642176.

The previous prime is 125255411. The next prime is 125255461. The reversal of 125255421 is 124552521.

It can be written as a sum of positive squares in 2 ways, for example, as 20602521 + 104652900 = 4539^2 + 10230^2 .

It is not a de Polignac number, because 125255421 - 2⁶ = 125255357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125255411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70866 + ... + 72611.

It is an arithmetic number, because the mean of its divisors is an integer number (15232581).

Almost surely, 2^125255421 is an apocalyptic number.

It is an amenable number.

125255421 is a deficient number, since it is larger than the sum of its proper divisors (57535551).

125255421 is a wasteful number, since it uses less digits than its factorization.

125255421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143580 (or 143577 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 125255421 is about 11191.7568325978. The cubic root of 125255421 is about 500.3403296323.

The spelling of 125255421 in words is "one hundred twenty-five million, two hundred fifty-five thousand, four hundred twenty-one".