254639 has 8 divisors (see below), whose sum is σ = 317568. Its totient is φ = 198360.

The previous prime is 254627. The next prime is 254647. The reversal of 254639 is 936452.

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

It is a cyclic number.

It is not a de Polignac number, because 254639 - 2⁴ = 254623 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 5 + 6 + 4⁷ + 3¹¹ + 9⁵ .

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 254639.

It is not an unprimeable number, because it can be changed into a prime (254659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1577 + ... + 1730.

It is an arithmetic number, because the mean of its divisors is an integer number (39696).

2²⁵⁴⁶³⁹ is an apocalyptic number.

254639 is a deficient number, since it is larger than the sum of its proper divisors (62929).

254639 is a wasteful number, since it uses less digits than its factorization.

254639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3325.

The product of its digits is 6480, while the sum is 29.

The square root of 254639 is about 504.6176770586. The cubic root of 254639 is about 63.3833184957.

It can be divided in two parts, 25 and 4639, that added together give a palindrome (4664).

The spelling of 254639 in words is "two hundred fifty-four thousand, six hundred thirty-nine".