245697 has 4 divisors (see below), whose sum is σ = 327600. Its totient is φ = 163796.

The previous prime is 245683. The next prime is 245711. The reversal of 245697 is 796542.

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 an interprime number because it is at equal distance from previous prime (245683) and next prime (245711).

It is a cyclic number.

It is not a de Polignac number, because 245697 - 2⁴ = 245681 is a prime.

It is an Ulam number.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (245627) 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, 40947 + ... + 40952.

It is an arithmetic number, because the mean of its divisors is an integer number (81900).

2²⁴⁵⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

245697 is a deficient number, since it is larger than the sum of its proper divisors (81903).

245697 is an equidigital number, since it uses as much as digits as its factorization.

245697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81902.

The product of its digits is 15120, while the sum is 33.

The square root of 245697 is about 495.6783231088. The cubic root of 245697 is about 62.6325294432.

The spelling of 245697 in words is "two hundred forty-five thousand, six hundred ninety-seven".