245802961 has 4 divisors (see below), whose sum is σ = 245836800. Its totient is φ = 245769124.

The previous prime is 245802919. The next prime is 245802971. The reversal of 245802961 is 169208542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 245802961 - 2¹⁵ = 245770193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245802961.

It is not an unprimeable number, because it can be changed into a prime (245802971) 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, 1081 + ... + 22198.

It is an arithmetic number, because the mean of its divisors is an integer number (61459200).

Almost surely, 2^245802961 is an apocalyptic number.

It is an amenable number.

245802961 is a deficient number, since it is larger than the sum of its proper divisors (33839).

245802961 is a wasteful number, since it uses less digits than its factorization.

245802961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33838.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 245802961 is about 15678.1045091554. The cubic root of 245802961 is about 626.4153192948.

The spelling of 245802961 in words is "two hundred forty-five million, eight hundred two thousand, nine hundred sixty-one".