425591 has 2 divisors, whose sum is σ = 425592. Its totient is φ = 425590.

The previous prime is 425563. The next prime is 425603. The reversal of 425591 is 195524.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425591 is a prime.

It is a super-2 number, since 2×425591² = 362255398562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 425591.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 425591.

It is not a weakly prime, because it can be changed into another prime (425501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212795 + 212796.

It is an arithmetic number, because the mean of its divisors is an integer number (212796).

2⁴²⁵⁵⁹¹ is an apocalyptic number.

425591 is a deficient number, since it is larger than the sum of its proper divisors (1).

425591 is an equidigital number, since it uses as much as digits as its factorization.

425591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 26.

The square root of 425591 is about 652.3733593580. The cubic root of 425591 is about 75.2195640021.

The spelling of 425591 in words is "four hundred twenty-five thousand, five hundred ninety-one".