21026325 has 12 divisors (see below), whose sum is σ = 34763648. Its totient is φ = 11214000.

The previous prime is 21026303. The next prime is 21026333. The reversal of 21026325 is 52362012.

It is not a de Polignac number, because 21026325 - 2⁷ = 21026197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140101 + ... + 140250.

Almost surely, 2^21026325 is an apocalyptic number.

21026325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21026325 is a deficient number, since it is larger than the sum of its proper divisors (13737323).

21026325 is a wasteful number, since it uses less digits than its factorization.

21026325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280364 (or 280359 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 21026325 is about 4585.4470883437. The cubic root of 21026325 is about 276.0076531169.

Adding to 21026325 its reverse (52362012), we get a palindrome (73388337).

The spelling of 21026325 in words is "twenty-one million, twenty-six thousand, three hundred twenty-five".