15420069 has 24 divisors (see below), whose sum is σ = 25633920. Its totient is φ = 8749728.

The previous prime is 15420061. The next prime is 15420073. The reversal of 15420069 is 96002451.

It is not a de Polignac number, because 15420069 - 2³ = 15420061 is a prime.

It is a super-2 number, since 2×15420069² = 475557055929522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15420061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9112 + ... + 10670.

It is an arithmetic number, because the mean of its divisors is an integer number (1068080).

Almost surely, 2^15420069 is an apocalyptic number.

It is an amenable number.

15420069 is a deficient number, since it is larger than the sum of its proper divisors (10213851).

15420069 is a wasteful number, since it uses less digits than its factorization.

15420069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729 (or 1726 counting only the distinct ones).

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

The square root of 15420069 is about 3926.8395689154. The cubic root of 15420069 is about 248.9022212497.

The spelling of 15420069 in words is "fifteen million, four hundred twenty thousand, sixty-nine".