25811273 has 2 divisors, whose sum is σ = 25811274. Its totient is φ = 25811272.

The previous prime is 25811231. The next prime is 25811339. The reversal of 25811273 is 37211852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25775929 + 35344 = 5077^2 + 188^2 .

It is a cyclic number.

It is not a de Polignac number, because 25811273 - 2⁶ = 25811209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25811173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12905636 + 12905637.

It is an arithmetic number, because the mean of its divisors is an integer number (12905637).

Almost surely, 2^25811273 is an apocalyptic number.

It is an amenable number.

25811273 is a deficient number, since it is larger than the sum of its proper divisors (1).

25811273 is an equidigital number, since it uses as much as digits as its factorization.

25811273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 29.

The square root of 25811273 is about 5080.4796033446. The cubic root of 25811273 is about 295.5310667509.

The spelling of 25811273 in words is "twenty-five million, eight hundred eleven thousand, two hundred seventy-three".