21325127 has 4 divisors (see below), whose sum is σ = 21456120. Its totient is φ = 21194136.

The previous prime is 21325099. The next prime is 21325147. The reversal of 21325127 is 72152312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21325127 - 2⁸ = 21324871 is a prime.

It is a super-2 number, since 2×21325127² = 909522083132258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21325147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65252 + ... + 65577.

It is an arithmetic number, because the mean of its divisors is an integer number (5364030).

Almost surely, 2^21325127 is an apocalyptic number.

21325127 is a deficient number, since it is larger than the sum of its proper divisors (130993).

21325127 is a wasteful number, since it uses less digits than its factorization.

21325127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130992.

The product of its digits is 840, while the sum is 23.

The square root of 21325127 is about 4617.9137064263. The cubic root of 21325127 is about 277.3089429685.

Adding to 21325127 its reverse (72152312), we get a palindrome (93477439).

The spelling of 21325127 in words is "twenty-one million, three hundred twenty-five thousand, one hundred twenty-seven".