125434139 has 4 divisors (see below), whose sum is σ = 128351256. Its totient is φ = 122517024.

The previous prime is 125434123. The next prime is 125434159. The reversal of 125434139 is 931434521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931434521 = 73 ⋅12759377.

It is a cyclic number.

It is not a de Polignac number, because 125434139 - 2⁴ = 125434123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125434159) 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, 1458494 + ... + 1458579.

It is an arithmetic number, because the mean of its divisors is an integer number (32087814).

Almost surely, 2^125434139 is an apocalyptic number.

125434139 is a deficient number, since it is larger than the sum of its proper divisors (2917117).

125434139 is an equidigital number, since it uses as much as digits as its factorization.

125434139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917116.

The product of its digits is 12960, while the sum is 32.

The square root of 125434139 is about 11199.7383451579. The cubic root of 125434139 is about 500.5781831508.

The spelling of 125434139 in words is "one hundred twenty-five million, four hundred thirty-four thousand, one hundred thirty-nine".