15121055 has 8 divisors (see below), whose sum is σ = 19100400. Its totient is φ = 11460096.

The previous prime is 15121033. The next prime is 15121061. The reversal of 15121055 is 55012151.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 15121055 - 2⁶ = 15120991 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79490 + ... + 79679.

It is an arithmetic number, because the mean of its divisors is an integer number (2387550).

Almost surely, 2^15121055 is an apocalyptic number.

15121055 is a deficient number, since it is larger than the sum of its proper divisors (3979345).

15121055 is a wasteful number, since it uses less digits than its factorization.

15121055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159193.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 15121055 is about 3888.5800750402. The cubic root of 15121055 is about 247.2828691193.

The spelling of 15121055 in words is "fifteen million, one hundred twenty-one thousand, fifty-five".