25130509 has 2 divisors, whose sum is σ = 25130510. Its totient is φ = 25130508.

The previous prime is 25130473. The next prime is 25130527. The reversal of 25130509 is 90503152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20520900 + 4609609 = 4530^2 + 2147^2 .

It is a cyclic number.

It is not a de Polignac number, because 25130509 - 2⁷ = 25130381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25130569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12565254 + 12565255.

It is an arithmetic number, because the mean of its divisors is an integer number (12565255).

Almost surely, 2^25130509 is an apocalyptic number.

It is an amenable number.

25130509 is a deficient number, since it is larger than the sum of its proper divisors (1).

25130509 is an equidigital number, since it uses as much as digits as its factorization.

25130509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 25130509 is about 5013.0339117145. The cubic root of 25130509 is about 292.9097051572.

The spelling of 25130509 in words is "twenty-five million, one hundred thirty thousand, five hundred nine".