125445531 has 8 divisors (see below), whose sum is σ = 167432464. Its totient is φ = 83544480.

The previous prime is 125445521. The next prime is 125445571. The reversal of 125445531 is 135544521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125445531 - 2²³ = 117056923 is a prime.

It is a super-2 number, since 2×125445531² = 31473162495743922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125445521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17980 + ... + 23961.

It is an arithmetic number, because the mean of its divisors is an integer number (20929058).

Almost surely, 2^125445531 is an apocalyptic number.

125445531 is a deficient number, since it is larger than the sum of its proper divisors (41986933).

125445531 is an equidigital number, since it uses as much as digits as its factorization.

125445531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42941.

The product of its digits is 12000, while the sum is 30.

The square root of 125445531 is about 11200.2469169211. The cubic root of 125445531 is about 500.5933369573.

The spelling of 125445531 in words is "one hundred twenty-five million, four hundred forty-five thousand, five hundred thirty-one".