245749 has 4 divisors (see below), whose sum is σ = 280864. Its totient is φ = 210636.

The previous prime is 245747. The next prime is 245753. The reversal of 245749 is 947542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 245749 - 2¹ = 245747 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245741) 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, 17547 + ... + 17560.

It is an arithmetic number, because the mean of its divisors is an integer number (70216).

2²⁴⁵⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

245749 is a deficient number, since it is larger than the sum of its proper divisors (35115).

245749 is an equidigital number, since it uses as much as digits as its factorization.

245749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35114.

The product of its digits is 10080, while the sum is 31.

The square root of 245749 is about 495.7307737069. The cubic root of 245749 is about 62.6369477060.

The spelling of 245749 in words is "two hundred forty-five thousand, seven hundred forty-nine".