125155439 has 4 divisors (see below), whose sum is σ = 126325224. Its totient is φ = 123985656.

The previous prime is 125155427. The next prime is 125155453. The reversal of 125155439 is 934551521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125155439 - 2¹² = 125151343 is a prime.

It is a super-2 number, since 2×125155439² = 31327767822565442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125155399 and 125155408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125185439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 584732 + ... + 584945.

It is an arithmetic number, because the mean of its divisors is an integer number (31581306).

Almost surely, 2^125155439 is an apocalyptic number.

125155439 is a deficient number, since it is larger than the sum of its proper divisors (1169785).

125155439 is a wasteful number, since it uses less digits than its factorization.

125155439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169784.

The product of its digits is 27000, while the sum is 35.

The square root of 125155439 is about 11187.2891711978. The cubic root of 125155439 is about 500.2071661525.

The spelling of 125155439 in words is "one hundred twenty-five million, one hundred fifty-five thousand, four hundred thirty-nine".