7221670 has 8 divisors (see below), whose sum is σ = 12999024. Its totient is φ = 2888664.

The previous prime is 7221661. The next prime is 7221689. The reversal of 7221670 is 761227.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361074 + ... + 361093.

It is an arithmetic number, because the mean of its divisors is an integer number (1624878).

Almost surely, 2^7221670 is an apocalyptic number.

7221670 is a deficient number, since it is larger than the sum of its proper divisors (5777354).

7221670 is a wasteful number, since it uses less digits than its factorization.

7221670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722174.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 7221670 is about 2687.3165053637. The cubic root of 7221670 is about 193.2914065511.

Adding to 7221670 its reverse (761227), we get a palindrome (7982897).

The spelling of 7221670 in words is "seven million, two hundred twenty-one thousand, six hundred seventy".