1373981 has 8 divisors (see below), whose sum is σ = 1577664. Its totient is φ = 1172160.

The previous prime is 1373959. The next prime is 1373989. The reversal of 1373981 is 1893731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1373981 - 2¹⁰ = 1372957 is a prime.

It is a super-2 number, since 2×1373981² = 3775647576722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373989) 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 in 7 ways as a sum of consecutive naturals, for example, 2021 + ... + 2613.

It is an arithmetic number, because the mean of its divisors is an integer number (197208).

2^1373981 is an apocalyptic number.

It is an amenable number.

1373981 is a deficient number, since it is larger than the sum of its proper divisors (203683).

1373981 is an equidigital number, since it uses as much as digits as its factorization.

1373981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931.

The product of its digits is 4536, while the sum is 32.

The square root of 1373981 is about 1172.1693563645. The cubic root of 1373981 is about 111.1715282161.

The spelling of 1373981 in words is "one million, three hundred seventy-three thousand, nine hundred eighty-one".