15122890 has 8 divisors (see below), whose sum is σ = 27221220. Its totient is φ = 6049152.

The previous prime is 15122869. The next prime is 15122897. The reversal of 15122890 is 9822151.

15122890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 14311089 + 811801 = 3783^2 + 901^2 .

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

It is not an unprimeable number, because it can be changed into a prime (15122897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756135 + ... + 756154.

Almost surely, 2^15122890 is an apocalyptic number.

15122890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15122890 is a deficient number, since it is larger than the sum of its proper divisors (12098330).

15122890 is a wasteful number, since it uses less digits than its factorization.

15122890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512296.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 15122890 is about 3888.8160151902. The cubic root of 15122890 is about 247.2928716337.

The spelling of 15122890 in words is "fifteen million, one hundred twenty-two thousand, eight hundred ninety".