125270639 has 4 divisors (see below), whose sum is σ = 134906856. Its totient is φ = 115634424.

The previous prime is 125270623. The next prime is 125270647. The reversal of 125270639 is 936072521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936072521 = 1109 ⋅844069.

It is a cyclic number.

It is not a de Polignac number, because 125270639 - 2⁴ = 125270623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125270599 and 125270608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125270609) 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, 4818089 + ... + 4818114.

It is an arithmetic number, because the mean of its divisors is an integer number (33726714).

Almost surely, 2^125270639 is an apocalyptic number.

125270639 is a deficient number, since it is larger than the sum of its proper divisors (9636217).

125270639 is an equidigital number, since it uses as much as digits as its factorization.

125270639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9636216.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 125270639 is about 11192.4366873349. The cubic root of 125270639 is about 500.3605918845.

The spelling of 125270639 in words is "one hundred twenty-five million, two hundred seventy thousand, six hundred thirty-nine".