749564221 has 24 divisors (see below), whose sum is σ = 953047296. Its totient is φ = 585164160.

The previous prime is 749564203. The next prime is 749564237. The reversal of 749564221 is 122465947.

It is not a de Polignac number, because 749564221 - 2⁹ = 749563709 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 (749564201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11310 + ... + 40336.

It is an arithmetic number, because the mean of its divisors is an integer number (39710304).

Almost surely, 2^749564221 is an apocalyptic number.

It is an amenable number.

749564221 is a deficient number, since it is larger than the sum of its proper divisors (203483075).

749564221 is a wasteful number, since it uses less digits than its factorization.

749564221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29089 (or 29082 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 749564221 is about 27378.1705195946. The cubic root of 749564221 is about 908.3842927690.

The spelling of 749564221 in words is "seven hundred forty-nine million, five hundred sixty-four thousand, two hundred twenty-one".