245438 has 4 divisors (see below), whose sum is σ = 368160. Its totient is φ = 122718.

The previous prime is 245437. The next prime is 245471. The reversal of 245438 is 834542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 834542 = 2 ⋅417271.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 245438.

It is not an unprimeable number, because it can be changed into a prime (245437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61358 + ... + 61361.

It is an arithmetic number, because the mean of its divisors is an integer number (92040).

2²⁴⁵⁴³⁸ is an apocalyptic number.

245438 is a deficient number, since it is larger than the sum of its proper divisors (122722).

245438 is a wasteful number, since it uses less digits than its factorization.

245438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122721.

The product of its digits is 3840, while the sum is 26.

The square root of 245438 is about 495.4169960750. The cubic root of 245438 is about 62.6105138053.

The spelling of 245438 in words is "two hundred forty-five thousand, four hundred thirty-eight".