245126779 has 4 divisors (see below), whose sum is σ = 245915280. Its totient is φ = 244338280.

The previous prime is 245126759. The next prime is 245126831. The reversal of 245126779 is 977621542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977621542 = 2 ⋅488810771.

It is a cyclic number.

It is not a de Polignac number, because 245126779 - 2⁵ = 245126747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245126759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393784 + ... + 394405.

It is an arithmetic number, because the mean of its divisors is an integer number (61478820).

Almost surely, 2^245126779 is an apocalyptic number.

245126779 is a deficient number, since it is larger than the sum of its proper divisors (788501).

245126779 is an equidigital number, since it uses as much as digits as its factorization.

245126779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788500.

The product of its digits is 211680, while the sum is 43.

The square root of 245126779 is about 15656.5251253271. The cubic root of 245126779 is about 625.8403875715.

The spelling of 245126779 in words is "two hundred forty-five million, one hundred twenty-six thousand, seven hundred seventy-nine".