420425 has 12 divisors (see below), whose sum is σ = 531216. Its totient is φ = 330000.

The previous prime is 420421. The next prime is 420439. The reversal of 420425 is 524024.

It is not a de Polignac number, because 420425 - 2² = 420421 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1550 + ... + 1800.

It is an arithmetic number, because the mean of its divisors is an integer number (44268).

2⁴²⁰⁴²⁵ is an apocalyptic number.

It is an amenable number.

420425 is a deficient number, since it is larger than the sum of its proper divisors (110791).

420425 is a wasteful number, since it uses less digits than its factorization.

420425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 420425 is about 648.4018815519. The cubic root of 420425 is about 74.9139754421.

Adding to 420425 its reverse (524024), we get a palindrome (944449).

The spelling of 420425 in words is "four hundred twenty thousand, four hundred twenty-five".