1371255481 has 2 divisors, whose sum is σ = 1371255482. Its totient is φ = 1371255480.

The previous prime is 1371255467. The next prime is 1371255491. The reversal of 1371255481 is 1845521731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1370184256 + 1071225 = 37016^2 + 1035^2 .

It is an emirp because it is prime and its reverse (1845521731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1371255481 - 2²³ = 1362866873 is a prime.

It is a super-2 number, since 2×1371255481² = 3760683188345082722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1371255481.

It is not a weakly prime, because it can be changed into another prime (1371255491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685627740 + 685627741.

It is an arithmetic number, because the mean of its divisors is an integer number (685627741).

Almost surely, 2^1371255481 is an apocalyptic number.

It is an amenable number.

1371255481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1371255481 is an equidigital number, since it uses as much as digits as its factorization.

1371255481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 37.

The square root of 1371255481 is about 37030.4669292733. The cubic root of 1371255481 is about 1110.9797050706.

The spelling of 1371255481 in words is "one billion, three hundred seventy-one million, two hundred fifty-five thousand, four hundred eighty-one".