275194921 has 9 divisors (see below), whose sum is σ = 281384229. Its totient is φ = 269139936.

The previous prime is 275194919. The next prime is 275194961. The reversal of 275194921 is 129491572.

It is a happy number.

The square root of 275194921 is 16589.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 57927321 + 217267600 = 7611^2 + 14740^2 .

It is not a de Polignac number, because 275194921 - 2¹ = 275194919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (275194961) 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 8 ways as a sum of consecutive naturals, for example, 879061 + ... + 879373.

Almost surely, 2^275194921 is an apocalyptic number.

275194921 is the 16589-th square number.

275194921 is the 8295-th centered octagonal number.

It is an amenable number.

275194921 is a deficient number, since it is larger than the sum of its proper divisors (6189308).

275194921 is an frugal number, since it uses more digits than its factorization.

275194921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732 (or 366 counting only the distinct ones).

The product of its digits is 45360, while the sum is 40.

The cubic root of 275194921 is about 650.4493311300.

The spelling of 275194921 in words is "two hundred seventy-five million, one hundred ninety-four thousand, nine hundred twenty-one".