1331377 has 2 divisors, whose sum is σ = 1331378. Its totient is φ = 1331376.

The previous prime is 1331347. The next prime is 1331381. The reversal of 1331377 is 7731331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 767376 + 564001 = 876^2 + 751^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331377 - 2⁷ = 1331249 is a prime.

It is a super-2 number, since 2×1331377² = 3545129432258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1331327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665688 + 665689.

It is an arithmetic number, because the mean of its divisors is an integer number (665689).

2^1331377 is an apocalyptic number.

It is an amenable number.

1331377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331377 is an equidigital number, since it uses as much as digits as its factorization.

1331377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1323, while the sum is 25.

The square root of 1331377 is about 1153.8531102354. The cubic root of 1331377 is about 110.0103846945.

The spelling of 1331377 in words is "one million, three hundred thirty-one thousand, three hundred seventy-seven".