7221142 has 8 divisors (see below), whose sum is σ = 11124576. Its totient is φ = 3512952.

The previous prime is 7221131. The next prime is 7221143. The reversal of 7221142 is 2411227.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7221143) 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, 48718 + ... + 48865.

It is an arithmetic number, because the mean of its divisors is an integer number (1390572).

Almost surely, 2^7221142 is an apocalyptic number.

7221142 is a deficient number, since it is larger than the sum of its proper divisors (3903434).

7221142 is a wasteful number, since it uses less digits than its factorization.

7221142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97622.

The product of its digits is 224, while the sum is 19.

The square root of 7221142 is about 2687.2182643023. The cubic root of 7221142 is about 193.2866957132.

Adding to 7221142 its reverse (2411227), we get a palindrome (9632369).

The spelling of 7221142 in words is "seven million, two hundred twenty-one thousand, one hundred forty-two".