424665 has 12 divisors (see below), whose sum is σ = 736164. Its totient is φ = 226464.

The previous prime is 424661. The next prime is 424667. The reversal of 424665 is 566424.

It is a happy number.

424665 is nontrivially palindromic in base 4.

It can be written as a sum of positive squares in 2 ways, for example, as 197136 + 227529 = 444^2 + 477^2 .

It is not a de Polignac number, because 424665 - 2² = 424661 is a prime.

It is a d-powerful number, because it can be written as 4⁵ + 2³ + 6² + 4⁸ + 6⁷ + 5⁷ .

It is not an unprimeable number, because it can be changed into a prime (424661) 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, 4674 + ... + 4763.

It is an arithmetic number, because the mean of its divisors is an integer number (61347).

2⁴²⁴⁶⁶⁵ is an apocalyptic number.

424665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

424665 is a deficient number, since it is larger than the sum of its proper divisors (311499).

424665 is a wasteful number, since it uses less digits than its factorization.

424665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9448 (or 9445 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 424665 is about 651.6632565981. The cubic root of 424665 is about 75.1649701984.

It can be divided in two parts, 424 and 665, that added together give a square (1089 = 33²).

The spelling of 424665 in words is "four hundred twenty-four thousand, six hundred sixty-five".