25587013 has 2 divisors, whose sum is σ = 25587014. Its totient is φ = 25587012.

The previous prime is 25586947. The next prime is 25587031. The reversal of 25587013 is 31078552.

Together with next prime (25587031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25020004 + 567009 = 5002^2 + 753^2 .

It is a cyclic number.

It is not a de Polignac number, because 25587013 - 2¹³ = 25578821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25587043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12793506 + 12793507.

It is an arithmetic number, because the mean of its divisors is an integer number (12793507).

Almost surely, 2^25587013 is an apocalyptic number.

It is an amenable number.

25587013 is a deficient number, since it is larger than the sum of its proper divisors (1).

25587013 is an equidigital number, since it uses as much as digits as its factorization.

25587013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 25587013 is about 5058.3607028364. The cubic root of 25587013 is about 294.6726734225.

The spelling of 25587013 in words is "twenty-five million, five hundred eighty-seven thousand, thirteen".