1040424021 has 240 divisors, whose sum is σ = 2230550784. Its totient is φ = 468052992.

The previous prime is 1040424017. The next prime is 1040424029. The reversal of 1040424021 is 1204240401.

1040424021 is a `hidden beast` number, since 1 + 0 + 404 + 240 + 21 = 666.

1040424021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1040424021 - 2² = 1040424017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1040423985 and 1040424003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040424029) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 45235816 + ... + 45235838.

Almost surely, 2^1040424021 is an apocalyptic number.

It is an amenable number.

1040424021 is an abundant number, since it is smaller than the sum of its proper divisors (1190126763).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1040424021 is a wasteful number, since it uses less digits than its factorization.

1040424021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1040424021 is about 32255.6044897627. The cubic root of 1040424021 is about 1013.2970776959.

Adding to 1040424021 its reverse (1204240401), we get a palindrome (2244664422).

The spelling of 1040424021 in words is "one billion, forty million, four hundred twenty-four thousand, twenty-one".