245517061 has 4 divisors (see below), whose sum is σ = 251505324. Its totient is φ = 239528800.

The previous prime is 245517059. The next prime is 245517067. The reversal of 245517061 is 160715542.

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

It can be written as a sum of positive squares in 2 ways, for example, as 96530625 + 148986436 = 9825^2 + 12206^2 .

It is a cyclic number.

It is not a de Polignac number, because 245517061 - 2¹ = 245517059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245517067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2994070 + ... + 2994151.

It is an arithmetic number, because the mean of its divisors is an integer number (62876331).

Almost surely, 2^245517061 is an apocalyptic number.

It is an amenable number.

245517061 is a deficient number, since it is larger than the sum of its proper divisors (5988263).

245517061 is an equidigital number, since it uses as much as digits as its factorization.

245517061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5988262.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 245517061 is about 15668.9840449214. The cubic root of 245517061 is about 626.1723582668.

The spelling of 245517061 in words is "two hundred forty-five million, five hundred seventeen thousand, sixty-one".