15420255 has 8 divisors (see below), whose sum is σ = 24672432. Its totient is φ = 8224128.

The previous prime is 15420253. The next prime is 15420259. The reversal of 15420255 is 55202451.

It is a happy number.

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

It is not a de Polignac number, because 15420255 - 2¹ = 15420253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15420253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513994 + ... + 514023.

It is an arithmetic number, because the mean of its divisors is an integer number (3084054).

Almost surely, 2^15420255 is an apocalyptic number.

15420255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15420255 is a deficient number, since it is larger than the sum of its proper divisors (9252177).

15420255 is a wasteful number, since it uses less digits than its factorization.

15420255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028025.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 15420255 is about 3926.8632520117. The cubic root of 15420255 is about 248.9032220153.

The spelling of 15420255 in words is "fifteen million, four hundred twenty thousand, two hundred fifty-five".