425310521 has 4 divisors (see below), whose sum is σ = 427919952. Its totient is φ = 422701092.

The previous prime is 425310469. The next prime is 425310533. The reversal of 425310521 is 125013524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 425310521 - 2¹⁰ = 425309497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (425310541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1304471 + ... + 1304796.

It is an arithmetic number, because the mean of its divisors is an integer number (106979988).

Almost surely, 2^425310521 is an apocalyptic number.

It is an amenable number.

425310521 is a deficient number, since it is larger than the sum of its proper divisors (2609431).

425310521 is a wasteful number, since it uses less digits than its factorization.

425310521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609430.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 425310521 is about 20623.0579934209. The cubic root of 425310521 is about 752.0303628387.

The spelling of 425310521 in words is "four hundred twenty-five million, three hundred ten thousand, five hundred twenty-one".