253647 has 6 divisors (see below), whose sum is σ = 366392. Its totient is φ = 169092.

The previous prime is 253639. The next prime is 253651. The reversal of 253647 is 746352.

It is a happy number.

It is not a de Polignac number, because 253647 - 2³ = 253639 is a prime.

It is a d-powerful number, because it can be written as 2⁹ + 5⁵ + 6⁵ + 3¹⁰ + 4⁸ + 7⁶ .

It is a Duffinian number.

253647 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 253647.

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 253647.

It is not an unprimeable number, because it can be changed into a prime (253607) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14083 + ... + 14100.

2²⁵³⁶⁴⁷ is an apocalyptic number.

253647 is a deficient number, since it is larger than the sum of its proper divisors (112745).

253647 is a wasteful number, since it uses less digits than its factorization.

253647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28189 (or 28186 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 253647 is about 503.6337955300. The cubic root of 253647 is about 63.3009036805.

Adding to 253647 its reverse (746352), we get a palindrome (999999).

It can be divided in two parts, 253 and 647, that added together give a square (900 = 30²).

The spelling of 253647 in words is "two hundred fifty-three thousand, six hundred forty-seven".