15121390 has 16 divisors (see below), whose sum is σ = 27564480. Its totient is φ = 5971680.

The previous prime is 15121387. The next prime is 15121391. The reversal of 15121390 is 9312151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15121391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8781 + ... + 10360.

It is an arithmetic number, because the mean of its divisors is an integer number (1722780).

Almost surely, 2^15121390 is an apocalyptic number.

15121390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15121390 is a deficient number, since it is larger than the sum of its proper divisors (12443090).

15121390 is a wasteful number, since it uses less digits than its factorization.

15121390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19227.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 15121390 is about 3888.6231496508. The cubic root of 15121390 is about 247.2846952518.

The spelling of 15121390 in words is "fifteen million, one hundred twenty-one thousand, three hundred ninety".