425021 has 4 divisors (see below), whose sum is σ = 434112. Its totient is φ = 415932.

The previous prime is 425003. The next prime is 425027. The reversal of 425021 is 120524.

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 425021 - 2¹⁴ = 408637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 424987 and 425005.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 425021.

It is not an unprimeable number, because it can be changed into a prime (425027) 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, 4475 + ... + 4568.

It is an arithmetic number, because the mean of its divisors is an integer number (108528).

2⁴²⁵⁰²¹ is an apocalyptic number.

It is an amenable number.

425021 is a deficient number, since it is larger than the sum of its proper divisors (9091).

425021 is an equidigital number, since it uses as much as digits as its factorization.

425021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9090.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 425021 is about 651.9363465861. The cubic root of 425021 is about 75.1859681266.

Adding to 425021 its reverse (120524), we get a palindrome (545545).

The spelling of 425021 in words is "four hundred twenty-five thousand, twenty-one".