1406321 has 4 divisors (see below), whose sum is σ = 1607232. Its totient is φ = 1205412.

The previous prime is 1406311. The next prime is 1406351. The reversal of 1406321 is 1236041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1236041 = 953 ⋅1297.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1406321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1406321.

It is not an unprimeable number, because it can be changed into a prime (1406311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100445 + ... + 100458.

It is an arithmetic number, because the mean of its divisors is an integer number (401808).

2^1406321 is an apocalyptic number.

It is an amenable number.

1406321 is a deficient number, since it is larger than the sum of its proper divisors (200911).

1406321 is an equidigital number, since it uses as much as digits as its factorization.

1406321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200910.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1406321 is about 1185.8840584138. The cubic root of 1406321 is about 112.0370041418.

The spelling of 1406321 in words is "one million, four hundred six thousand, three hundred twenty-one".