245457 has 8 divisors (see below), whose sum is σ = 363680. Its totient is φ = 163620.

The previous prime is 245437. The next prime is 245471. The reversal of 245457 is 754542.

It is not a de Polignac number, because 245457 - 2¹² = 241361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 9091 = 245457 / (2 + 4 + 5 + 4 + 5 + 7).

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 245457.

It is not an unprimeable number, because it can be changed into a prime (245407) 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, 4519 + ... + 4572.

It is an arithmetic number, because the mean of its divisors is an integer number (45460).

2²⁴⁵⁴⁵⁷ is an apocalyptic number.

245457 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

245457 is a deficient number, since it is larger than the sum of its proper divisors (118223).

245457 is an equidigital number, since it uses as much as digits as its factorization.

245457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9100 (or 9094 counting only the distinct ones).

The product of its digits is 5600, while the sum is 27.

The square root of 245457 is about 495.4361714691. The cubic root of 245457 is about 62.6121293784.

Adding to 245457 its reverse (754542), we get a palindrome (999999).

The spelling of 245457 in words is "two hundred forty-five thousand, four hundred fifty-seven".