7142224 has 10 divisors (see below), whose sum is σ = 13838090. Its totient is φ = 3571104.

The previous prime is 7142209. The next prime is 7142263. The reversal of 7142224 is 4222417.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6594624 + 547600 = 2568^2 + 740^2 .

It is a super-2 number, since 2×7142224² = 102022727332352, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7142195 and 7142204.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 223179 + ... + 223210.

It is an arithmetic number, because the mean of its divisors is an integer number (1383809).

Almost surely, 2^7142224 is an apocalyptic number.

It is an amenable number.

7142224 is a deficient number, since it is larger than the sum of its proper divisors (6695866).

7142224 is a wasteful number, since it uses less digits than its factorization.

7142224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446397 (or 446391 counting only the distinct ones).

The product of its digits is 896, while the sum is 22.

The square root of 7142224 is about 2672.4939663169. The cubic root of 7142224 is about 192.5799881224.

The spelling of 7142224 in words is "seven million, one hundred forty-two thousand, two hundred twenty-four".