245738 has 4 divisors (see below), whose sum is σ = 368610. Its totient is φ = 122868.

The previous prime is 245723. The next prime is 245741. The reversal of 245738 is 837542.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 837542 = 2 ⋅418771.

It can be written as a sum of positive squares in only one way, i.e., 165649 + 80089 = 407^2 + 283^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 245738.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 245738.

It is an unprimeable number.

245738 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61433 + ... + 61436.

245738 is a Friedman number, since it can be written as 8+5*3*(4^7-2), using all its digits and the basic arithmetic operations.

2²⁴⁵⁷³⁸ is an apocalyptic number.

245738 is a deficient number, since it is larger than the sum of its proper divisors (122872).

245738 is a wasteful number, since it uses less digits than its factorization.

245738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122871.

The product of its digits is 6720, while the sum is 29.

The square root of 245738 is about 495.7196788509. The cubic root of 245738 is about 62.6360131255.

The spelling of 245738 in words is "two hundred forty-five thousand, seven hundred thirty-eight".