21376325 has 12 divisors (see below), whose sum is σ = 26882208. Its totient is φ = 16858800.

The previous prime is 21376321. The next prime is 21376339. The reversal of 21376325 is 52367312.

It is not a de Polignac number, because 21376325 - 2² = 21376321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21376321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4247 + ... + 7796.

It is an arithmetic number, because the mean of its divisors is an integer number (2240184).

Almost surely, 2^21376325 is an apocalyptic number.

21376325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21376325 is a deficient number, since it is larger than the sum of its proper divisors (5505883).

21376325 is a wasteful number, since it uses less digits than its factorization.

21376325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12124 (or 12119 counting only the distinct ones).

The product of its digits is 7560, while the sum is 29.

The square root of 21376325 is about 4623.4537955948. The cubic root of 21376325 is about 277.5306894609.

The spelling of 21376325 in words is "twenty-one million, three hundred seventy-six thousand, three hundred twenty-five".