245072643 has 4 divisors (see below), whose sum is σ = 326763528. Its totient is φ = 163381760.

The previous prime is 245072627. The next prime is 245072647. The reversal of 245072643 is 346270542.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 245072643 - 2⁴ = 245072627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245072647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40845438 + ... + 40845443.

It is an arithmetic number, because the mean of its divisors is an integer number (81690882).

Almost surely, 2^245072643 is an apocalyptic number.

245072643 is a deficient number, since it is larger than the sum of its proper divisors (81690885).

245072643 is an equidigital number, since it uses as much as digits as its factorization.

245072643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81690884.

The product of its (nonzero) digits is 40320, while the sum is 33.

The square root of 245072643 is about 15654.7961660317. The cubic root of 245072643 is about 625.7943121083.

The spelling of 245072643 in words is "two hundred forty-five million, seventy-two thousand, six hundred forty-three".