121525015 has 4 divisors (see below), whose sum is σ = 145830024. Its totient is φ = 97220008.

The previous prime is 121524971. The next prime is 121525021. The reversal of 121525015 is 510525121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121525015 - 2¹³ = 121516823 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12152497 + ... + 12152506.

It is an arithmetic number, because the mean of its divisors is an integer number (36457506).

Almost surely, 2^121525015 is an apocalyptic number.

121525015 is a deficient number, since it is larger than the sum of its proper divisors (24305009).

121525015 is an equidigital number, since it uses as much as digits as its factorization.

121525015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24305008.

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

The square root of 121525015 is about 11023.8384875687. The cubic root of 121525015 is about 495.3230758289.

The spelling of 121525015 in words is "one hundred twenty-one million, five hundred twenty-five thousand, fifteen".