25042621 has 2 divisors, whose sum is σ = 25042622. Its totient is φ = 25042620.

The previous prime is 25042613. The next prime is 25042639. The reversal of 25042621 is 12624052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23863225 + 1179396 = 4885^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 25042621 - 2³ = 25042613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25042592 and 25042601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25042651) 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, 12521310 + 12521311.

It is an arithmetic number, because the mean of its divisors is an integer number (12521311).

Almost surely, 2^25042621 is an apocalyptic number.

It is an amenable number.

25042621 is a deficient number, since it is larger than the sum of its proper divisors (1).

25042621 is an equidigital number, since it uses as much as digits as its factorization.

25042621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 25042621 is about 5004.2602849972. The cubic root of 25042621 is about 292.5678455618.

Adding to 25042621 its reverse (12624052), we get a palindrome (37666673).

The spelling of 25042621 in words is "twenty-five million, forty-two thousand, six hundred twenty-one".