1420221 has 8 divisors (see below), whose sum is σ = 2065824. Its totient is φ = 860720.

The previous prime is 1420207. The next prime is 1420253. The reversal of 1420221 is 1220241.

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 1420221 - 2⁷ = 1420093 is a prime.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1420197 and 1420206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420201) 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, 21486 + ... + 21551.

It is an arithmetic number, because the mean of its divisors is an integer number (258228).

2^1420221 is an apocalyptic number.

1420221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1420221 is a deficient number, since it is larger than the sum of its proper divisors (645603).

1420221 is a wasteful number, since it uses less digits than its factorization.

1420221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43051.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1420221 is about 1191.7302547137. The cubic root of 1420221 is about 112.4049171914.

Adding to 1420221 its reverse (1220241), we get a palindrome (2640462).

The spelling of 1420221 in words is "one million, four hundred twenty thousand, two hundred twenty-one".