1381277 has 2 divisors, whose sum is σ = 1381278. Its totient is φ = 1381276.

The previous prime is 1381273. The next prime is 1381279. The reversal of 1381277 is 7721831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1104601 + 276676 = 1051^2 + 526^2 .

It is a cyclic number.

It is not a de Polignac number, because 1381277 - 2² = 1381273 is a prime.

Together with 1381279, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1381271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690638 + 690639.

It is an arithmetic number, because the mean of its divisors is an integer number (690639).

2^1381277 is an apocalyptic number.

It is an amenable number.

1381277 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381277 is an equidigital number, since it uses as much as digits as its factorization.

1381277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2352, while the sum is 29.

The square root of 1381277 is about 1175.2774140602. The cubic root of 1381277 is about 111.3679588796.

The spelling of 1381277 in words is "one million, three hundred eighty-one thousand, two hundred seventy-seven".