1371321 has 12 divisors (see below), whose sum is σ = 2263872. Its totient is φ = 783576.

The previous prime is 1371301. The next prime is 1371343. The reversal of 1371321 is 1231731.

It is not a de Polignac number, because 1371321 - 2⁷ = 1371193 is a prime.

1371321 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1371294 and 1371303.

It is not an unprimeable number, because it can be changed into a prime (1371301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10821 + ... + 10946.

It is an arithmetic number, because the mean of its divisors is an integer number (188656).

2^1371321 is an apocalyptic number.

It is an amenable number.

1371321 is a deficient number, since it is larger than the sum of its proper divisors (892551).

1371321 is a wasteful number, since it uses less digits than its factorization.

1371321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21780 (or 21777 counting only the distinct ones).

The product of its digits is 126, while the sum is 18.

The square root of 1371321 is about 1171.0341583404. The cubic root of 1371321 is about 111.0997399104.

The spelling of 1371321 in words is "one million, three hundred seventy-one thousand, three hundred twenty-one".