125535431 has 4 divisors (see below), whose sum is σ = 143469072. Its totient is φ = 107601792.

The previous prime is 125535427. The next prime is 125535493. The reversal of 125535431 is 134535521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134535521 = 1481 ⋅90841.

It is a cyclic number.

It is not a de Polignac number, because 125535431 - 2² = 125535427 is a prime.

It is a super-2 number, since 2×125535431² = 31518288872711522, 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 = 125535394 and 125535403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125535401) 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, 8966810 + ... + 8966823.

It is an arithmetic number, because the mean of its divisors is an integer number (35867268).

Almost surely, 2^125535431 is an apocalyptic number.

125535431 is a deficient number, since it is larger than the sum of its proper divisors (17933641).

125535431 is an equidigital number, since it uses as much as digits as its factorization.

125535431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17933640.

The product of its digits is 9000, while the sum is 29.

The square root of 125535431 is about 11204.2595025285. The cubic root of 125535431 is about 500.7128910895.

The spelling of 125535431 in words is "one hundred twenty-five million, five hundred thirty-five thousand, four hundred thirty-one".