275005421 has 2 divisors, whose sum is σ = 275005422. Its totient is φ = 275005420.

The previous prime is 275005417. The next prime is 275005441. The reversal of 275005421 is 124500572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254881225 + 20124196 = 15965^2 + 4486^2 .

It is a cyclic number.

It is not a de Polignac number, because 275005421 - 2² = 275005417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (275005441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137502710 + 137502711.

It is an arithmetic number, because the mean of its divisors is an integer number (137502711).

Almost surely, 2^275005421 is an apocalyptic number.

It is an amenable number.

275005421 is a deficient number, since it is larger than the sum of its proper divisors (1).

275005421 is an equidigital number, since it uses as much as digits as its factorization.

275005421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 275005421 is about 16583.2874002714. The cubic root of 275005421 is about 650.2999964317.

Adding to 275005421 its reverse (124500572), we get a palindrome (399505993).

The spelling of 275005421 in words is "two hundred seventy-five million, five thousand, four hundred twenty-one".