254320561 has 16 divisors (see below), whose sum is σ = 294772608. Its totient is φ = 216851200.

The previous prime is 254320537. The next prime is 254320579. The reversal of 254320561 is 165023452.

It is a cyclic number.

It is not a de Polignac number, because 254320561 - 2⁷ = 254320433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (254320531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55971 + ... + 60343.

It is an arithmetic number, because the mean of its divisors is an integer number (18423288).

Almost surely, 2^254320561 is an apocalyptic number.

It is an amenable number.

254320561 is a deficient number, since it is larger than the sum of its proper divisors (40452047).

254320561 is a wasteful number, since it uses less digits than its factorization.

254320561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4712.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 254320561 is about 15947.4311724491. The cubic root of 254320561 is about 633.5688612146.

It can be divided in two parts, 2543 and 20561, that added together give a square (23104 = 152²).

The spelling of 254320561 in words is "two hundred fifty-four million, three hundred twenty thousand, five hundred sixty-one".