1373881 has 2 divisors, whose sum is σ = 1373882. Its totient is φ = 1373880.

The previous prime is 1373873. The next prime is 1373887. The reversal of 1373881 is 1883731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 826281 + 547600 = 909^2 + 740^2 .

It is an emirp because it is prime and its reverse (1883731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1373881 - 2³ = 1373873 is a prime.

It is a super-2 number, since 2×1373881² = 3775098004322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1373887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686940 + 686941.

It is an arithmetic number, because the mean of its divisors is an integer number (686941).

2^1373881 is an apocalyptic number.

It is an amenable number.

1373881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373881 is an equidigital number, since it uses as much as digits as its factorization.

1373881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 1373881 is about 1172.1266996362. The cubic root of 1373881 is about 111.1688310845.

The spelling of 1373881 in words is "one million, three hundred seventy-three thousand, eight hundred eighty-one".