7221149 has 8 divisors (see below), whose sum is σ = 8115072. Its totient is φ = 6375600.

The previous prime is 7221143. The next prime is 7221157. The reversal of 7221149 is 9411227.

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

It is a de Polignac number, because none of the positive numbers 2^k-7221149 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 11777 + ... + 12374.

It is an arithmetic number, because the mean of its divisors is an integer number (1014384).

Almost surely, 2^7221149 is an apocalyptic number.

It is an amenable number.

7221149 is a deficient number, since it is larger than the sum of its proper divisors (893923).

7221149 is a wasteful number, since it uses less digits than its factorization.

7221149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24187.

The product of its digits is 1008, while the sum is 26.

The square root of 7221149 is about 2687.2195667641. The cubic root of 7221149 is about 193.2867581690.

The spelling of 7221149 in words is "seven million, two hundred twenty-one thousand, one hundred forty-nine".