274990145 has 4 divisors (see below), whose sum is σ = 329988180. Its totient is φ = 219992112.

The previous prime is 274990141. The next prime is 274990159. The reversal of 274990145 is 541099472.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67831696 + 207158449 = 8236^2 + 14393^2 .

It is a cyclic number.

It is not a de Polignac number, because 274990145 - 2² = 274990141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (274990141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27499010 + ... + 27499019.

It is an arithmetic number, because the mean of its divisors is an integer number (82497045).

Almost surely, 2^274990145 is an apocalyptic number.

It is an amenable number.

274990145 is a deficient number, since it is larger than the sum of its proper divisors (54998035).

274990145 is an equidigital number, since it uses as much as digits as its factorization.

274990145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54998034.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 274990145 is about 16582.8268096848. The cubic root of 274990145 is about 650.2879552549.

The spelling of 274990145 in words is "two hundred seventy-four million, nine hundred ninety thousand, one hundred forty-five".