274439721 has 16 divisors (see below), whose sum is σ = 395691264. Its totient is φ = 168532224.

The previous prime is 274439719. The next prime is 274439723. The reversal of 274439721 is 127934472.

It is an interprime number because it is at equal distance from previous prime (274439719) and next prime (274439723).

It is not a de Polignac number, because 274439721 - 2¹ = 274439719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 274439721.

It is not an unprimeable number, because it can be changed into a prime (274439723) 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, 54850 + ... + 59643.

It is an arithmetic number, because the mean of its divisors is an integer number (24730704).

Almost surely, 2^274439721 is an apocalyptic number.

It is an amenable number.

274439721 is a deficient number, since it is larger than the sum of its proper divisors (121251543).

274439721 is a wasteful number, since it uses less digits than its factorization.

274439721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114560.

The product of its digits is 84672, while the sum is 39.

The square root of 274439721 is about 16566.2222911562. Note that the first 4 decimals coincide. The cubic root of 274439721 is about 649.8537903885.

The spelling of 274439721 in words is "two hundred seventy-four million, four hundred thirty-nine thousand, seven hundred twenty-one".