7222749 has 4 divisors (see below), whose sum is σ = 9630336. Its totient is φ = 4815164.

The previous prime is 7222729. The next prime is 7222757. The reversal of 7222749 is 9472227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7222749 - 2⁸ = 7222493 is a prime.

It is a Curzon number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7222729) 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, 1203789 + ... + 1203794.

It is an arithmetic number, because the mean of its divisors is an integer number (2407584).

Almost surely, 2^7222749 is an apocalyptic number.

It is an amenable number.

7222749 is a deficient number, since it is larger than the sum of its proper divisors (2407587).

7222749 is a wasteful number, since it uses less digits than its factorization.

7222749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407586.

The product of its digits is 14112, while the sum is 33.

The square root of 7222749 is about 2687.5172557586. The cubic root of 7222749 is about 193.3010327198.

The spelling of 7222749 in words is "seven million, two hundred twenty-two thousand, seven hundred forty-nine".