25020581 has 2 divisors, whose sum is σ = 25020582. Its totient is φ = 25020580.

The previous prime is 25020571. The next prime is 25020601. The reversal of 25020581 is 18502052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22944100 + 2076481 = 4790^2 + 1441^2 .

It is a cyclic number.

It is not a de Polignac number, because 25020581 - 2⁶ = 25020517 is a prime.

It is a super-2 number, since 2×25020581² = 1252058947155122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25020571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12510290 + 12510291.

It is an arithmetic number, because the mean of its divisors is an integer number (12510291).

Almost surely, 2^25020581 is an apocalyptic number.

It is an amenable number.

25020581 is a deficient number, since it is larger than the sum of its proper divisors (1).

25020581 is an equidigital number, since it uses as much as digits as its factorization.

25020581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 25020581 is about 5002.0576765967. The cubic root of 25020581 is about 292.4819907581.

The spelling of 25020581 in words is "twenty-five million, twenty thousand, five hundred eighty-one".