15122493 has 6 divisors (see below), whose sum is σ = 21843614. Its totient is φ = 10081656.

The previous prime is 15122483. The next prime is 15122501. The reversal of 15122493 is 39422151.

15122493 is a `hidden beast` number, since 151 + 22 + 493 = 666.

15122493 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 only one way, i.e., 8982009 + 6140484 = 2997^2 + 2478^2 .

It is not a de Polignac number, because 15122493 - 2¹³ = 15114301 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 (15122413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 840130 + ... + 840147.

Almost surely, 2^15122493 is an apocalyptic number.

It is an amenable number.

15122493 is a deficient number, since it is larger than the sum of its proper divisors (6721121).

15122493 is a wasteful number, since it uses less digits than its factorization.

15122493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680283 (or 1680280 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 15122493 is about 3888.7649710416. The cubic root of 15122493 is about 247.2907076706.

It can be divided in two parts, 1512 and 2493, that added together give a triangular number (4005 = T₈₉).

The spelling of 15122493 in words is "fifteen million, one hundred twenty-two thousand, four hundred ninety-three".