1142221 has 4 divisors (see below), whose sum is σ = 1145152. Its totient is φ = 1139292.

The previous prime is 1142201. The next prime is 1142233. The reversal of 1142221 is 1222411.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-1142221 is a prime.

It is a Duffinian number.

1142221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142201) 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, 771 + ... + 1696.

It is an arithmetic number, because the mean of its divisors is an integer number (286288).

2^1142221 is an apocalyptic number.

It is an amenable number.

1142221 is a deficient number, since it is larger than the sum of its proper divisors (2931).

1142221 is an equidigital number, since it uses as much as digits as its factorization.

1142221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2930.

The product of its digits is 32, while the sum is 13.

The square root of 1142221 is about 1068.7473976577. The cubic root of 1142221 is about 104.5321894380.

Adding to 1142221 its reverse (1222411), we get a palindrome (2364632).

The spelling of 1142221 in words is "one million, one hundred forty-two thousand, two hundred twenty-one".