125550513 has 32 divisors (see below), whose sum is σ = 205516800. Its totient is φ = 75114000.

The previous prime is 125550479. The next prime is 125550517. The reversal of 125550513 is 315055521.

It is not a de Polignac number, because 125550513 - 2⁹ = 125550001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125550517) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20788 + ... + 26138.

It is an arithmetic number, because the mean of its divisors is an integer number (6422400).

Almost surely, 2^125550513 is an apocalyptic number.

It is an amenable number.

125550513 is a deficient number, since it is larger than the sum of its proper divisors (79966287).

125550513 is a wasteful number, since it uses less digits than its factorization.

125550513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5450 (or 5444 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 125550513 is about 11204.9325299173. The cubic root of 125550513 is about 500.7329423992.

The spelling of 125550513 in words is "one hundred twenty-five million, five hundred fifty thousand, five hundred thirteen".