125541513 has 12 divisors (see below), whose sum is σ = 183002820. Its totient is φ = 82925856.

The previous prime is 125541509. The next prime is 125541517. The reversal of 125541513 is 315145521.

It is an interprime number because it is at equal distance from previous prime (125541509) and next prime (125541517).

It can be written as a sum of positive squares in 2 ways, for example, as 101364624 + 24176889 = 10068^2 + 4917^2 .

It is not a de Polignac number, because 125541513 - 2² = 125541509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125541517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63006 + ... + 64967.

It is an arithmetic number, because the mean of its divisors is an integer number (15250235).

Almost surely, 2^125541513 is an apocalyptic number.

It is an amenable number.

125541513 is a deficient number, since it is larger than the sum of its proper divisors (57461307).

125541513 is a wasteful number, since it uses less digits than its factorization.

125541513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128088 (or 128085 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 125541513 is about 11204.5309138759. The cubic root of 125541513 is about 500.7209772173.

The spelling of 125541513 in words is "one hundred twenty-five million, five hundred forty-one thousand, five hundred thirteen".