245490261 has 8 divisors (see below), whose sum is σ = 327645024. Its totient is φ = 163497840.

The previous prime is 245490257. The next prime is 245490269. The reversal of 245490261 is 162094542.

245490261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 245490261 - 2² = 245490257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245490269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37011 + ... + 43136.

It is an arithmetic number, because the mean of its divisors is an integer number (40955628).

Almost surely, 2^245490261 is an apocalyptic number.

It is an amenable number.

245490261 is a deficient number, since it is larger than the sum of its proper divisors (82154763).

245490261 is a wasteful number, since it uses less digits than its factorization.

245490261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81171.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 245490261 is about 15668.1288289317. The cubic root of 245490261 is about 626.1495736589.

The spelling of 245490261 in words is "two hundred forty-five million, four hundred ninety thousand, two hundred sixty-one".