254240561 has 4 divisors (see below), whose sum is σ = 254318592. Its totient is φ = 254162532.

The previous prime is 254240543. The next prime is 254240573. The reversal of 254240561 is 165042452.

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.

It is a cyclic number.

It is not a de Polignac number, because 254240561 - 2¹⁰ = 254239537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (254240521) 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, 33905 + ... + 40718.

It is an arithmetic number, because the mean of its divisors is an integer number (63579648).

Almost surely, 2^254240561 is an apocalyptic number.

It is an amenable number.

254240561 is a deficient number, since it is larger than the sum of its proper divisors (78031).

254240561 is an equidigital number, since it uses as much as digits as its factorization.

254240561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78030.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 254240561 is about 15944.9227342123. The cubic root of 254240561 is about 633.5024216731.

The spelling of 254240561 in words is "two hundred fifty-four million, two hundred forty thousand, five hundred sixty-one".