1400221 has 4 divisors (see below), whose sum is σ = 1407744. Its totient is φ = 1392700.

The previous prime is 1400197. The next prime is 1400249. The reversal of 1400221 is 1220041.

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.

It is a cyclic number.

It is not a de Polignac number, because 1400221 - 2⁷ = 1400093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1400198 and 1400207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400251) 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 3 ways as a sum of consecutive naturals, for example, 3475 + ... + 3856.

It is an arithmetic number, because the mean of its divisors is an integer number (351936).

2^1400221 is an apocalyptic number.

It is an amenable number.

1400221 is a deficient number, since it is larger than the sum of its proper divisors (7523).

1400221 is an equidigital number, since it uses as much as digits as its factorization.

1400221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7522.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1400221 is about 1183.3093424798. The cubic root of 1400221 is about 111.8747803331.

Adding to 1400221 its reverse (1220041), we get a palindrome (2620262).

The spelling of 1400221 in words is "one million, four hundred thousand, two hundred twenty-one".