274401561 has 16 divisors (see below), whose sum is σ = 428335488. Its totient is φ = 152976000.

The previous prime is 274401559. The next prime is 274401563. The reversal of 274401561 is 165104472.

It is an interprime number because it is at equal distance from previous prime (274401559) and next prime (274401563).

It is not a de Polignac number, because 274401561 - 2¹ = 274401559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (274401563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158490 + ... + 160211.

It is an arithmetic number, because the mean of its divisors is an integer number (26770968).

Almost surely, 2^274401561 is an apocalyptic number.

274401561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

274401561 is a deficient number, since it is larger than the sum of its proper divisors (153933927).

274401561 is a wasteful number, since it uses less digits than its factorization.

274401561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318752.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 274401561 is about 16565.0705099616. The cubic root of 274401561 is about 649.8236689348.

The spelling of 274401561 in words is "two hundred seventy-four million, four hundred one thousand, five hundred sixty-one".