245537 has 4 divisors (see below), whose sum is σ = 258480. Its totient is φ = 232596.

The previous prime is 245533. The next prime is 245561. The reversal of 245537 is 735542.

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, and also an emirpimes, since its reverse is a distinct semiprime: 735542 = 2 ⋅367771.

It is a cyclic number.

It is not a de Polignac number, because 245537 - 2² = 245533 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6443 + ... + 6480.

It is an arithmetic number, because the mean of its divisors is an integer number (64620).

2²⁴⁵⁵³⁷ is an apocalyptic number.

It is an amenable number.

245537 is a deficient number, since it is larger than the sum of its proper divisors (12943).

245537 is a wasteful number, since it uses less digits than its factorization.

245537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12942.

The product of its digits is 4200, while the sum is 26.

The square root of 245537 is about 495.5169018308. The cubic root of 245537 is about 62.6189308769.

The spelling of 245537 in words is "two hundred forty-five thousand, five hundred thirty-seven".