25073021 has 2 divisors, whose sum is σ = 25073022. Its totient is φ = 25073020.

The previous prime is 25073003. The next prime is 25073039. The reversal of 25073021 is 12037052.

It is a balanced prime because it is at equal distance from previous prime (25073003) and next prime (25073039).

It can be written as a sum of positive squares in only one way, i.e., 18156121 + 6916900 = 4261^2 + 2630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25073021 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25072984 and 25073002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25073921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12536510 + 12536511.

It is an arithmetic number, because the mean of its divisors is an integer number (12536511).

Almost surely, 2^25073021 is an apocalyptic number.

It is an amenable number.

25073021 is a deficient number, since it is larger than the sum of its proper divisors (1).

25073021 is an equidigital number, since it uses as much as digits as its factorization.

25073021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 25073021 is about 5007.2967757064. The cubic root of 25073021 is about 292.6861833615.

The spelling of 25073021 in words is "twenty-five million, seventy-three thousand, twenty-one".