721924041 has 16 divisors (see below), whose sum is σ = 979712000. Its totient is φ = 472771728.

The previous prime is 721924031. The next prime is 721924067. The reversal of 721924041 is 140429127.

It is not a de Polignac number, because 721924041 - 2⁷ = 721923913 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (721924031) 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 15 ways as a sum of consecutive naturals, for example, 39510 + ... + 54816.

It is an arithmetic number, because the mean of its divisors is an integer number (61232000).

Almost surely, 2^721924041 is an apocalyptic number.

It is an amenable number.

721924041 is a deficient number, since it is larger than the sum of its proper divisors (257787959).

721924041 is a wasteful number, since it uses less digits than its factorization.

721924041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15588.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 721924041 is about 26868.6441972795. The cubic root of 721924041 is about 897.0786101781.

The spelling of 721924041 in words is "seven hundred twenty-one million, nine hundred twenty-four thousand, forty-one".