1376981 has 2 divisors, whose sum is σ = 1376982. Its totient is φ = 1376980.

The previous prime is 1376971. The next prime is 1377023. The reversal of 1376981 is 1896731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 722500 + 654481 = 850^2 + 809^2 .

It is a cyclic number.

It is not a de Polignac number, because 1376981 - 2¹⁸ = 1114837 is a prime.

It is a super-2 number, since 2×1376981² = 3792153348722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1376971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688490 + 688491.

It is an arithmetic number, because the mean of its divisors is an integer number (688491).

2^1376981 is an apocalyptic number.

It is an amenable number.

1376981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1376981 is an equidigital number, since it uses as much as digits as its factorization.

1376981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 1376981 is about 1173.4483371670. The cubic root of 1376981 is about 111.2523813823.

The spelling of 1376981 in words is "one million, three hundred seventy-six thousand, nine hundred eighty-one".