425647 has 4 divisors (see below), whose sum is σ = 427000. Its totient is φ = 424296.

The previous prime is 425641. The next prime is 425653. The reversal of 425647 is 746524.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (425641) and next prime (425653).

It is a cyclic number.

It is not a de Polignac number, because 425647 - 2⁷ = 425519 is a prime.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 73 + ... + 925.

It is an arithmetic number, because the mean of its divisors is an integer number (106750).

2⁴²⁵⁶⁴⁷ is an apocalyptic number.

425647 is a deficient number, since it is larger than the sum of its proper divisors (1353).

425647 is an equidigital number, since it uses as much as digits as its factorization.

425647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352.

The product of its digits is 6720, while the sum is 28.

The square root of 425647 is about 652.4162781538. The cubic root of 425647 is about 75.2228630309. Note that the first 3 decimals are identical.

It can be divided in two parts, 4 and 25647, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 425647 in words is "four hundred twenty-five thousand, six hundred forty-seven".