425669 has 4 divisors (see below), whose sum is σ = 428640. Its totient is φ = 422700.

The previous prime is 425653. The next prime is 425681. The reversal of 425669 is 966524.

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 425669 - 2⁴ = 425653 is a prime.

It is a super-2 number, since 2×425669² = 362388195122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425609) 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, 1259 + ... + 1560.

It is an arithmetic number, because the mean of its divisors is an integer number (107160).

2⁴²⁵⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

425669 is a deficient number, since it is larger than the sum of its proper divisors (2971).

425669 is a wasteful number, since it uses less digits than its factorization.

425669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2970.

The product of its digits is 12960, while the sum is 32.

The square root of 425669 is about 652.4331383368. The cubic root of 425669 is about 75.2241589987.

The spelling of 425669 in words is "four hundred twenty-five thousand, six hundred sixty-nine".