125521501 has 8 divisors (see below), whose sum is σ = 147330560. Its totient is φ = 104681808.

The previous prime is 125521499. The next prime is 125521519. The reversal of 125521501 is 105125521.

It is a happy number.

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

It is not a de Polignac number, because 125521501 - 2¹ = 125521499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125521001) 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, 242061 + ... + 242578.

It is an arithmetic number, because the mean of its divisors is an integer number (18416320).

Almost surely, 2^125521501 is an apocalyptic number.

It is an amenable number.

125521501 is a deficient number, since it is larger than the sum of its proper divisors (21809059).

125521501 is an equidigital number, since it uses as much as digits as its factorization.

125521501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484683.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 125521501 is about 11203.6378466996. The cubic root of 125521501 is about 500.6943699211.

The spelling of 125521501 in words is "one hundred twenty-five million, five hundred twenty-one thousand, five hundred one".