1277161253 has 2 divisors, whose sum is σ = 1277161254. Its totient is φ = 1277161252.

The previous prime is 1277161211. The next prime is 1277161271. The reversal of 1277161253 is 3521617721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 972379489 + 304781764 = 31183^2 + 17458^2 .

It is an emirp because it is prime and its reverse (3521617721) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1277161253 is a prime.

It is a super-2 number, since 2×1277161253² = 3262281732329060018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1277161283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638580626 + 638580627.

It is an arithmetic number, because the mean of its divisors is an integer number (638580627).

Almost surely, 2^1277161253 is an apocalyptic number.

It is an amenable number.

1277161253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277161253 is an equidigital number, since it uses as much as digits as its factorization.

1277161253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 35.

The square root of 1277161253 is about 35737.3929239389. The cubic root of 1277161253 is about 1084.9637916095.

Adding to 1277161253 its reverse (3521617721), we get a palindrome (4798778974).

The spelling of 1277161253 in words is "one billion, two hundred seventy-seven million, one hundred sixty-one thousand, two hundred fifty-three".