275736421 has 2 divisors, whose sum is σ = 275736422. Its totient is φ = 275736420.

The previous prime is 275736401. The next prime is 275736463. The reversal of 275736421 is 124637572.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273737025 + 1999396 = 16545^2 + 1414^2 .

It is a cyclic number.

It is not a de Polignac number, because 275736421 - 2¹⁷ = 275605349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (275736401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137868210 + 137868211.

It is an arithmetic number, because the mean of its divisors is an integer number (137868211).

Almost surely, 2^275736421 is an apocalyptic number.

It is an amenable number.

275736421 is a deficient number, since it is larger than the sum of its proper divisors (1).

275736421 is an equidigital number, since it uses as much as digits as its factorization.

275736421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 37.

The square root of 275736421 is about 16605.3130352908. The cubic root of 275736421 is about 650.8756805023.

The spelling of 275736421 in words is "two hundred seventy-five million, seven hundred thirty-six thousand, four hundred twenty-one".