7142222 has 4 divisors (see below), whose sum is σ = 10713336. Its totient is φ = 3571110.

The previous prime is 7142209. The next prime is 7142263. The reversal of 7142222 is 2222417.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2222417 = 1123 ⋅1979.

It is a super-2 number, since 2×7142222² = 102022670194568, which contains 22 as substring.

It is an Ulam number.

7142222 is a modest number, since divided by 2222 gives 714 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 7142194 and 7142203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1785554 + ... + 1785557.

It is an arithmetic number, because the mean of its divisors is an integer number (2678334).

Almost surely, 2^7142222 is an apocalyptic number.

7142222 is a deficient number, since it is larger than the sum of its proper divisors (3571114).

7142222 is a wasteful number, since it uses less digits than its factorization.

7142222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3571113.

The product of its digits is 448, while the sum is 20.

The square root of 7142222 is about 2672.4935921345. The cubic root of 7142222 is about 192.5799701467.

Adding to 7142222 its reverse (2222417), we get a palindrome (9364639).

The spelling of 7142222 in words is "seven million, one hundred forty-two thousand, two hundred twenty-two".