425406521 has 16 divisors (see below), whose sum is σ = 466099200. Its totient is φ = 386519040.

The previous prime is 425406503. The next prime is 425406533. The reversal of 425406521 is 125604524.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425406521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (425406571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303380 + ... + 304778.

It is an arithmetic number, because the mean of its divisors is an integer number (29131200).

Almost surely, 2^425406521 is an apocalyptic number.

It is an amenable number.

425406521 is a deficient number, since it is larger than the sum of its proper divisors (40692679).

425406521 is a wasteful number, since it uses less digits than its factorization.

425406521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 425406521 is about 20625.3853539758. The cubic root of 425406521 is about 752.0869407036.

The spelling of 425406521 in words is "four hundred twenty-five million, four hundred six thousand, five hundred twenty-one".