425621 has 8 divisors (see below), whose sum is σ = 498624. Its totient is φ = 355680.

The previous prime is 425609. The next prime is 425641. The reversal of 425621 is 126524.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 425621 - 2¹⁰ = 424597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 425593 and 425602.

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 425621.

It is not an unprimeable number, because it can be changed into a prime (425641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455 + ... + 1028.

It is an arithmetic number, because the mean of its divisors is an integer number (62328).

2⁴²⁵⁶²¹ is an apocalyptic number.

425621 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

425621 is a deficient number, since it is larger than the sum of its proper divisors (73003).

425621 is a wasteful number, since it uses less digits than its factorization.

425621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531.

The product of its digits is 480, while the sum is 20.

The square root of 425621 is about 652.3963519211. The cubic root of 425621 is about 75.2213313750.

The spelling of 425621 in words is "four hundred twenty-five thousand, six hundred twenty-one".