1377281 has 2 divisors, whose sum is σ = 1377282. Its totient is φ = 1377280.

The previous prime is 1377269. The next prime is 1377293. The reversal of 1377281 is 1827731.

It is a balanced prime because it is at equal distance from previous prime (1377269) and next prime (1377293).

It can be written as a sum of positive squares in only one way, i.e., 1210000 + 167281 = 1100^2 + 409^2 .

It is an emirp because it is prime and its reverse (1827731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1377281 - 2¹⁰ = 1376257 is a prime.

It is a super-2 number, since 2×1377281² = 3793805905922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1377781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688640 + 688641.

It is an arithmetic number, because the mean of its divisors is an integer number (688641).

2^1377281 is an apocalyptic number.

It is an amenable number.

1377281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377281 is an equidigital number, since it uses as much as digits as its factorization.

1377281 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 1377281 is about 1173.5761585854. The cubic root of 1377281 is about 111.2604602377.

It can be divided in two parts, 13 and 77281, that multiplied together give a triangular number (1004653 = T₁₄₁₇).

The spelling of 1377281 in words is "one million, three hundred seventy-seven thousand, two hundred eighty-one".