425810921 has 4 divisors (see below), whose sum is σ = 425870592. Its totient is φ = 425751252.

The previous prime is 425810899. The next prime is 425810941. The reversal of 425810921 is 129018524.

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 a de Polignac number, because none of the positive numbers 2^k-425810921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425810941) 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, 17405 + ... + 33978.

It is an arithmetic number, because the mean of its divisors is an integer number (106467648).

Almost surely, 2^425810921 is an apocalyptic number.

It is an amenable number.

425810921 is a deficient number, since it is larger than the sum of its proper divisors (59671).

425810921 is an equidigital number, since it uses as much as digits as its factorization.

425810921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59670.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 425810921 is about 20635.1864784402. The cubic root of 425810921 is about 752.3251815545.

The spelling of 425810921 in words is "four hundred twenty-five million, eight hundred ten thousand, nine hundred twenty-one".