21325298 has 4 divisors (see below), whose sum is σ = 31987950. Its totient is φ = 10662648.

The previous prime is 21325279. The next prime is 21325307. The reversal of 21325298 is 89252312.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 18774889 + 2550409 = 4333^2 + 1597^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5331323 + ... + 5331326.

Almost surely, 2^21325298 is an apocalyptic number.

21325298 is a deficient number, since it is larger than the sum of its proper divisors (10662652).

21325298 is a wasteful number, since it uses less digits than its factorization.

21325298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10662651.

The product of its digits is 8640, while the sum is 32.

The square root of 21325298 is about 4617.9322212436. The cubic root of 21325298 is about 277.3096841865.

The spelling of 21325298 in words is "twenty-one million, three hundred twenty-five thousand, two hundred ninety-eight".