455639 has 4 divisors (see below), whose sum is σ = 479640. Its totient is φ = 431640.

The previous prime is 455627. The next prime is 455647. The reversal of 455639 is 936554.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936554 = 2 ⋅468277.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-455639 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 (455659) 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, 11972 + ... + 12009.

It is an arithmetic number, because the mean of its divisors is an integer number (119910).

455639 is a Friedman number, since it can be written as 9+5+5^4*3^6, using all its digits and the basic arithmetic operations.

2⁴⁵⁵⁶³⁹ is an apocalyptic number.

455639 is a deficient number, since it is larger than the sum of its proper divisors (24001).

455639 is a wasteful number, since it uses less digits than its factorization.

455639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24000.

The product of its digits is 16200, while the sum is 32.

The square root of 455639 is about 675.0103702907. The cubic root of 455639 is about 76.9497057294.

The spelling of 455639 in words is "four hundred fifty-five thousand, six hundred thirty-nine".