425624491 has 6 divisors (see below), whose sum is σ = 448120460. Its totient is φ = 403138008.

The previous prime is 425624489. The next prime is 425624497. The reversal of 425624491 is 194426524.

It is not a de Polignac number, because 425624491 - 2¹ = 425624489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 425624491.

It is not an unprimeable number, because it can be changed into a prime (425624497) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87561 + ... + 92293.

Almost surely, 2^425624491 is an apocalyptic number.

425624491 is a deficient number, since it is larger than the sum of its proper divisors (22495969).

425624491 is an frugal number, since it uses more digits than its factorization.

425624491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9485 (or 4752 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 425624491 is about 20630.6686997780. The cubic root of 425624491 is about 752.2153703286.

The spelling of 425624491 in words is "four hundred twenty-five million, six hundred twenty-four thousand, four hundred ninety-one".