274640561 has 8 divisors (see below), whose sum is σ = 299091240. Its totient is φ = 250664832.

The previous prime is 274640537. The next prime is 274640579. The reversal of 274640561 is 165046472.

It can be written as a sum of positive squares in 4 ways, for example, as 32993536 + 241647025 = 5744^2 + 15545^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 274640561 - 2¹⁰ = 274639537 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 (274640581) 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, 117530 + ... + 119843.

It is an arithmetic number, because the mean of its divisors is an integer number (37386405).

Almost surely, 2^274640561 is an apocalyptic number.

It is an amenable number.

274640561 is a deficient number, since it is larger than the sum of its proper divisors (24450679).

274640561 is a wasteful number, since it uses less digits than its factorization.

274640561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237475.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 274640561 is about 16572.2829145534. The cubic root of 274640561 is about 650.0122766912.

The spelling of 274640561 in words is "two hundred seventy-four million, six hundred forty thousand, five hundred sixty-one".