1040022721 has 4 divisors (see below), whose sum is σ = 1062150912. Its totient is φ = 1017894532.

The previous prime is 1040022713. The next prime is 1040022743. The reversal of 1040022721 is 1272200401.

It is a happy number.

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 1040022721 - 2³ = 1040022713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1040022421) 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, 11064025 + ... + 11064118.

It is an arithmetic number, because the mean of its divisors is an integer number (265537728).

Almost surely, 2^1040022721 is an apocalyptic number.

It is an amenable number.

1040022721 is a deficient number, since it is larger than the sum of its proper divisors (22128191).

1040022721 is an equidigital number, since it uses as much as digits as its factorization.

1040022721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22128190.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 1040022721 is about 32249.3832654208. The cubic root of 1040022721 is about 1013.1667819699.

The spelling of 1040022721 in words is "one billion, forty million, twenty-two thousand, seven hundred twenty-one".