1373921 has 8 divisors (see below), whose sum is σ = 1433664. Its totient is φ = 1315440.

The previous prime is 1373891. The next prime is 1373959. The reversal of 1373921 is 1293731.

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 1373921 - 2¹⁴ = 1357537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1373321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2366 + ... + 2888.

It is an arithmetic number, because the mean of its divisors is an integer number (179208).

2^1373921 is an apocalyptic number.

It is an amenable number.

1373921 is a deficient number, since it is larger than the sum of its proper divisors (59743).

1373921 is an equidigital number, since it uses as much as digits as its factorization.

1373921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631.

The product of its digits is 1134, while the sum is 26.

The square root of 1373921 is about 1172.1437625138. The cubic root of 1373921 is about 111.1699099529.

The spelling of 1373921 in words is "one million, three hundred seventy-three thousand, nine hundred twenty-one".