275730121 has 4 divisors (see below), whose sum is σ = 275776452. Its totient is φ = 275683792.

The previous prime is 275730023. The next prime is 275730127. The reversal of 275730121 is 121037572.

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 231374521 + 44355600 = 15211^2 + 6660^2 .

It is a cyclic number.

It is not a de Polignac number, because 275730121 - 2²³ = 267341513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 275730121.

It is not an unprimeable number, because it can be changed into a prime (275730127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12646 + ... + 26671.

It is an arithmetic number, because the mean of its divisors is an integer number (68944113).

Almost surely, 2^275730121 is an apocalyptic number.

It is an amenable number.

275730121 is a deficient number, since it is larger than the sum of its proper divisors (46331).

275730121 is an equidigital number, since it uses as much as digits as its factorization.

275730121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46330.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 275730121 is about 16605.1233358864. The cubic root of 275730121 is about 650.8707234156.

Adding to 275730121 its reverse (121037572), we get a palindrome (396767693).

The spelling of 275730121 in words is "two hundred seventy-five million, seven hundred thirty thousand, one hundred twenty-one".