15420156 has 48 divisors (see below), whose sum is σ = 38374560. Its totient is φ = 4802560.

The previous prime is 15420151. The next prime is 15420161. The reversal of 15420156 is 65102451.

It is an interprime number because it is at equal distance from previous prime (15420151) and next prime (15420161).

It is a super-2 number, since 2×15420156² = 475562422128672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15420151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54736 + ... + 55016.

It is an arithmetic number, because the mean of its divisors is an integer number (799470).

Almost surely, 2^15420156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15420156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19187280).

15420156 is an abundant number, since it is smaller than the sum of its proper divisors (22954404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15420156 is a wasteful number, since it uses less digits than its factorization.

15420156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 15420156 is about 3926.8506465105. The cubic root of 15420156 is about 248.9026893508.

It can be divided in two parts, 15420 and 156, that added together give a triangular number (15576 = T₁₇₆).

The spelling of 15420156 in words is "fifteen million, four hundred twenty thousand, one hundred fifty-six".