425240239 has 2 divisors, whose sum is σ = 425240240. Its totient is φ = 425240238.

The previous prime is 425240203. The next prime is 425240269. The reversal of 425240239 is 932042524.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425240239 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 425240239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425240269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212620119 + 212620120.

It is an arithmetic number, because the mean of its divisors is an integer number (212620120).

Almost surely, 2^425240239 is an apocalyptic number.

425240239 is a deficient number, since it is larger than the sum of its proper divisors (1).

425240239 is an equidigital number, since it uses as much as digits as its factorization.

425240239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 425240239 is about 20621.3539565180. The cubic root of 425240239 is about 751.9889365497.

The spelling of 425240239 in words is "four hundred twenty-five million, two hundred forty thousand, two hundred thirty-nine".