425643 has 8 divisors (see below), whose sum is σ = 578448. Its totient is φ = 278304.

The previous prime is 425641. The next prime is 425653. The reversal of 425643 is 346524.

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

It is not a de Polignac number, because 425643 - 2¹ = 425641 is a prime.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1180 + ... + 1497.

It is an arithmetic number, because the mean of its divisors is an integer number (72306).

2⁴²⁵⁶⁴³ is an apocalyptic number.

425643 is a deficient number, since it is larger than the sum of its proper divisors (152805).

425643 is a wasteful number, since it uses less digits than its factorization.

425643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2733.

The product of its digits is 2880, while the sum is 24.

The square root of 425643 is about 652.4132126191. The cubic root of 425643 is about 75.2226273956. Note that the first 3 decimals are identical.

The spelling of 425643 in words is "four hundred twenty-five thousand, six hundred forty-three".