25773021 has 12 divisors (see below), whose sum is σ = 37445148. Its totient is φ = 17081664.

The previous prime is 25773001. The next prime is 25773023. The reversal of 25773021 is 12037752.

It can be written as a sum of positive squares in 2 ways, for example, as 24147396 + 1625625 = 4914^2 + 1275^2 .

It is not a de Polignac number, because 25773021 - 2¹⁴ = 25756637 is a prime.

It is a super-2 number, since 2×25773021² = 1328497222932882, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25773023) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 6720 + ... + 9833.

It is an arithmetic number, because the mean of its divisors is an integer number (3120429).

Almost surely, 2^25773021 is an apocalyptic number.

It is an amenable number.

25773021 is a deficient number, since it is larger than the sum of its proper divisors (11672127).

25773021 is a wasteful number, since it uses less digits than its factorization.

25773021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16732 (or 16729 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 25773021 is about 5076.7136023219. The cubic root of 25773021 is about 295.3850033955.

The spelling of 25773021 in words is "twenty-five million, seven hundred seventy-three thousand, twenty-one".