125342531 has 4 divisors (see below), whose sum is σ = 125428200. Its totient is φ = 125256864.

The previous prime is 125342521. The next prime is 125342537. The reversal of 125342531 is 135243521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135243521 = 7 ⋅19320503.

It is a cyclic number.

It is not a de Polignac number, because 125342531 - 2²⁶ = 58233667 is a prime.

It is a super-2 number, since 2×125342531² = 31421500154971922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125342531.

It is not an unprimeable number, because it can be changed into a prime (125342537) 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, 40601 + ... + 43578.

It is an arithmetic number, because the mean of its divisors is an integer number (31357050).

Almost surely, 2^125342531 is an apocalyptic number.

125342531 is a deficient number, since it is larger than the sum of its proper divisors (85669).

125342531 is an equidigital number, since it uses as much as digits as its factorization.

125342531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85668.

The product of its digits is 3600, while the sum is 26.

The square root of 125342531 is about 11195.6478597712. The cubic root of 125342531 is about 500.4562914695.

The spelling of 125342531 in words is "one hundred twenty-five million, three hundred forty-two thousand, five hundred thirty-one".