274906561 has 4 divisors (see below), whose sum is σ = 279009712. Its totient is φ = 270803412.

The previous prime is 274906553. The next prime is 274906571. The reversal of 274906561 is 165609472.

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 274906561 - 2³ = 274906553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (274906501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2051475 + ... + 2051608.

It is an arithmetic number, because the mean of its divisors is an integer number (69752428).

Almost surely, 2^274906561 is an apocalyptic number.

It is an amenable number.

274906561 is a deficient number, since it is larger than the sum of its proper divisors (4103151).

274906561 is an equidigital number, since it uses as much as digits as its factorization.

274906561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4103150.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 274906561 is about 16580.3064205702. The cubic root of 274906561 is about 650.2220629828. Note that the first 3 decimals are identical.

The spelling of 274906561 in words is "two hundred seventy-four million, nine hundred six thousand, five hundred sixty-one".