21344125 has 48 divisors (see below), whose sum is σ = 31382208. Its totient is φ = 14364000.

The previous prime is 21344119. The next prime is 21344131. The reversal of 21344125 is 52144312.

It is an interprime number because it is at equal distance from previous prime (21344119) and next prime (21344131).

It is not a de Polignac number, because 21344125 - 2³ = 21344117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21344096 and 21344105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 496354 + ... + 496396.

It is an arithmetic number, because the mean of its divisors is an integer number (653796).

Almost surely, 2^21344125 is an apocalyptic number.

21344125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21344125 is a deficient number, since it is larger than the sum of its proper divisors (10038083).

21344125 is a wasteful number, since it uses less digits than its factorization.

21344125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 78 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 21344125 is about 4619.9702379994. The cubic root of 21344125 is about 277.3912676303.

Adding to 21344125 its reverse (52144312), we get a palindrome (73488437).

The spelling of 21344125 in words is "twenty-one million, three hundred forty-four thousand, one hundred twenty-five".