22921025 has 6 divisors (see below), whose sum is σ = 28422102. Its totient is φ = 18336800.

The previous prime is 22921013. The next prime is 22921037. The reversal of 22921025 is 52012922.

It is an interprime number because it is at equal distance from previous prime (22921013) and next prime (22921037).

It can be written as a sum of positive squares in 3 ways, for example, as 802816 + 22118209 = 896^2 + 4703^2 .

It is not a de Polignac number, because 22921025 - 2¹⁴ = 22904641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 458396 + ... + 458445.

It is an arithmetic number, because the mean of its divisors is an integer number (4737017).

Almost surely, 2^22921025 is an apocalyptic number.

22921025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22921025 is a deficient number, since it is larger than the sum of its proper divisors (5501077).

22921025 is an equidigital number, since it uses as much as digits as its factorization.

22921025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916851 (or 916846 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 22921025 is about 4787.5907302108. The cubic root of 22921025 is about 284.0608255951.

Adding to 22921025 its reverse (52012922), we get a palindrome (74933947).

The spelling of 22921025 in words is "twenty-two million, nine hundred twenty-one thousand, twenty-five".