1377491 has 2 divisors, whose sum is σ = 1377492. Its totient is φ = 1377490.

The previous prime is 1377487. The next prime is 1377499. The reversal of 1377491 is 1947731.

It is a weak prime.

It is an emirp because it is prime and its reverse (1947731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1377491 - 2² = 1377487 is a prime.

It is not a weakly prime, because it can be changed into another prime (1377499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688745 + 688746.

It is an arithmetic number, because the mean of its divisors is an integer number (688746).

2^1377491 is an apocalyptic number.

1377491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377491 is an equidigital number, since it uses as much as digits as its factorization.

1377491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292, while the sum is 32.

The square root of 1377491 is about 1173.6656252954. The cubic root of 1377491 is about 111.2661147384.

The spelling of 1377491 in words is "one million, three hundred seventy-seven thousand, four hundred ninety-one".