23121025 has 6 divisors (see below), whose sum is σ = 28670102. Its totient is φ = 18496800.

The previous prime is 23121011. The next prime is 23121031. The reversal of 23121025 is 52012132.

It can be written as a sum of positive squares in 3 ways, for example, as 2436721 + 20684304 = 1561^2 + 4548^2 .

It is not a de Polignac number, because 23121025 - 2⁷ = 23120897 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, 462396 + ... + 462445.

Almost surely, 2^23121025 is an apocalyptic number.

23121025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23121025 is a deficient number, since it is larger than the sum of its proper divisors (5549077).

23121025 is an equidigital number, since it uses as much as digits as its factorization.

23121025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924851 (or 924846 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 23121025 is about 4808.4326968358. The cubic root of 23121025 is about 284.8846357748.

Adding to 23121025 its reverse (52012132), we get a palindrome (75133157).

The spelling of 23121025 in words is "twenty-three million, one hundred twenty-one thousand, twenty-five".