15420055 has 12 divisors (see below), whose sum is σ = 21525480. Its totient is φ = 10573584.

The previous prime is 15420049. The next prime is 15420061. The reversal of 15420055 is 55002451.

It is an interprime number because it is at equal distance from previous prime (15420049) and next prime (15420061).

It is not a de Polignac number, because 15420055 - 2³ = 15420047 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31225 + ... + 31714.

It is an arithmetic number, because the mean of its divisors is an integer number (1793790).

Almost surely, 2^15420055 is an apocalyptic number.

15420055 is a deficient number, since it is larger than the sum of its proper divisors (6105425).

15420055 is an equidigital number, since it uses as much as digits as its factorization.

15420055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62958 (or 62951 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 15420055 is about 3926.8377863110. The cubic root of 15420055 is about 248.9021459229.

The spelling of 15420055 in words is "fifteen million, four hundred twenty thousand, fifty-five".