125503641 has 8 divisors (see below), whose sum is σ = 185931360. Its totient is φ = 83669076.

The previous prime is 125503613. The next prime is 125503649. The reversal of 125503641 is 146305521.

125503641 is a `hidden beast` number, since 12 + 5 + 5 + 0 + 3 + 641 = 666.

It is not a de Polignac number, because 125503641 - 2⁶ = 125503577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4648283 = 125503641 / (1 + 2 + 5 + 5 + 0 + 3 + 6 + 4 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125503649) 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, 2324115 + ... + 2324168.

It is an arithmetic number, because the mean of its divisors is an integer number (23241420).

Almost surely, 2^125503641 is an apocalyptic number.

It is an amenable number.

125503641 is a deficient number, since it is larger than the sum of its proper divisors (60427719).

125503641 is an equidigital number, since it uses as much as digits as its factorization.

125503641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4648292 (or 4648286 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 125503641 is about 11202.8407558083. The cubic root of 125503641 is about 500.6706214649.

The spelling of 125503641 in words is "one hundred twenty-five million, five hundred three thousand, six hundred forty-one".