253749 has 8 divisors (see below), whose sum is σ = 346752. Its totient is φ = 164960.

The previous prime is 253741. The next prime is 253751. The reversal of 253749 is 947352.

253749 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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 253749 - 2³ = 253741 is a prime.

253749 is strictly pandigital in base 7.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 909 + ... + 1154.

It is an arithmetic number, because the mean of its divisors is an integer number (43344).

2²⁵³⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

253749 is a deficient number, since it is larger than the sum of its proper divisors (93003).

253749 is a wasteful number, since it uses less digits than its factorization.

253749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107.

The product of its digits is 7560, while the sum is 30.

The square root of 253749 is about 503.7350494059. The cubic root of 253749 is about 63.3093876850.

The spelling of 253749 in words is "two hundred fifty-three thousand, seven hundred forty-nine".