125545531 has 4 divisors (see below), whose sum is σ = 125895600. Its totient is φ = 125195464.

The previous prime is 125545529. The next prime is 125545543. The reversal of 125545531 is 135545521.

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 125545531 - 2¹ = 125545529 is a prime.

It is a super-2 number, since 2×125545531² = 31523360708143922, 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 = 125545493 and 125545502.

It is not an unprimeable number, because it can be changed into a prime (125545591) 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, 174496 + ... + 175213.

It is an arithmetic number, because the mean of its divisors is an integer number (31473900).

Almost surely, 2^125545531 is an apocalyptic number.

125545531 is a deficient number, since it is larger than the sum of its proper divisors (350069).

125545531 is an equidigital number, since it uses as much as digits as its factorization.

125545531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350068.

The product of its digits is 15000, while the sum is 31.

The square root of 125545531 is about 11204.7102149052. The cubic root of 125545531 is about 500.7263190770.

The spelling of 125545531 in words is "one hundred twenty-five million, five hundred forty-five thousand, five hundred thirty-one".