245715 has 8 divisors (see below), whose sum is σ = 393168. Its totient is φ = 131040.

The previous prime is 245711. The next prime is 245719. The reversal of 245715 is 517542.

It is an interprime number because it is at equal distance from previous prime (245711) and next prime (245719).

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

It is not a de Polignac number, because 245715 - 2² = 245711 is a prime.

It is a super-2 number, since 2×245715² = 120751722450, which contains 22 as substring.

245715 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (245711) 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, 8176 + ... + 8205.

It is an arithmetic number, because the mean of its divisors is an integer number (49146).

245715 is a Friedman number, since it can be written as 15*(4^7-5+2), using all its digits and the basic arithmetic operations.

2²⁴⁵⁷¹⁵ is an apocalyptic number.

245715 is a deficient number, since it is larger than the sum of its proper divisors (147453).

245715 is a wasteful number, since it uses less digits than its factorization.

245715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16389.

The product of its digits is 1400, while the sum is 24.

The square root of 245715 is about 495.6964797131. The cubic root of 245715 is about 62.6340589124.

The spelling of 245715 in words is "two hundred forty-five thousand, seven hundred fifteen".