15421130 has 16 divisors (see below), whose sum is σ = 27811944. Its totient is φ = 6156480.

The previous prime is 15421121. The next prime is 15421139. The reversal of 15421130 is 3112451.

It is an interprime number because it is at equal distance from previous prime (15421121) and next prime (15421139).

It can be written as a sum of positive squares in 4 ways, for example, as 13227769 + 2193361 = 3637^2 + 1481^2 .

It is a super-2 number, since 2×15421130² = 475622500953800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15421099 and 15421108.

It is not an unprimeable number, because it can be changed into a prime (15421139) 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, 5444 + ... + 7776.

Almost surely, 2^15421130 is an apocalyptic number.

15421130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15421130 is a deficient number, since it is larger than the sum of its proper divisors (12390814).

15421130 is a wasteful number, since it uses less digits than its factorization.

15421130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 15421130 is about 3926.9746625106. The cubic root of 15421130 is about 248.9079298104.

Adding to 15421130 its reverse (3112451), we get a palindrome (18533581).

It can be divided in two parts, 15421 and 130, that added together give a palindrome (15551).

The spelling of 15421130 in words is "fifteen million, four hundred twenty-one thousand, one hundred thirty".