1275540517 has 2 divisors, whose sum is σ = 1275540518. Its totient is φ = 1275540516.

The previous prime is 1275540457. The next prime is 1275540521. The reversal of 1275540517 is 7150455721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1250400321 + 25140196 = 35361^2 + 5014^2 .

It is a cyclic number.

It is not a de Polignac number, because 1275540517 - 2¹¹ = 1275538469 is a prime.

It is a super-2 number, since 2×1275540517² = 3254007221017254578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1275540577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637770258 + 637770259.

It is an arithmetic number, because the mean of its divisors is an integer number (637770259).

Almost surely, 2^1275540517 is an apocalyptic number.

It is an amenable number.

1275540517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1275540517 is an equidigital number, since it uses as much as digits as its factorization.

1275540517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49000, while the sum is 37.

The square root of 1275540517 is about 35714.7100926215. The cubic root of 1275540517 is about 1084.5046524510.

The spelling of 1275540517 in words is "one billion, two hundred seventy-five million, five hundred forty thousand, five hundred seventeen".