2565245437 has 2 divisors, whose sum is σ = 2565245438. Its totient is φ = 2565245436.

The previous prime is 2565245429. The next prime is 2565245471. The reversal of 2565245437 is 7345425652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1346816601 + 1218428836 = 36699^2 + 34906^2 .

It is a cyclic number.

It is not a de Polignac number, because 2565245437 - 2³ = 2565245429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2565245393 and 2565245402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2565245737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282622718 + 1282622719.

It is an arithmetic number, because the mean of its divisors is an integer number (1282622719).

Almost surely, 2^2565245437 is an apocalyptic number.

It is an amenable number.

2565245437 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565245437 is an equidigital number, since it uses as much as digits as its factorization.

2565245437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008000, while the sum is 43.

The square root of 2565245437 is about 50648.2520626329. The cubic root of 2565245437 is about 1368.9144502424.

The spelling of 2565245437 in words is "two billion, five hundred sixty-five million, two hundred forty-five thousand, four hundred thirty-seven".