274149021 has 16 divisors (see below), whose sum is σ = 397497024. Its totient is φ = 167364864.

The previous prime is 274149017. The next prime is 274149053. The reversal of 274149021 is 120941472.

It is not a de Polignac number, because 274149021 - 2² = 274149017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 274149021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (274149011) 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, 70755 + ... + 74528.

It is an arithmetic number, because the mean of its divisors is an integer number (24843564).

Almost surely, 2^274149021 is an apocalyptic number.

It is an amenable number.

274149021 is a deficient number, since it is larger than the sum of its proper divisors (123348003).

274149021 is a wasteful number, since it uses less digits than its factorization.

274149021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145340.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 274149021 is about 16557.4460892977. The cubic root of 274149021 is about 649.6242569993.

The spelling of 274149021 in words is "two hundred seventy-four million, one hundred forty-nine thousand, twenty-one".