1042440453 has 24 divisors (see below), whose sum is σ = 1586282880. Its totient is φ = 657849600.

The previous prime is 1042440403. The next prime is 1042440499. The reversal of 1042440453 is 3540442401.

It is a happy number.

It is not a de Polignac number, because 1042440453 - 2⁸ = 1042440197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042440403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 400725 + ... + 403317.

It is an arithmetic number, because the mean of its divisors is an integer number (66095120).

Almost surely, 2^1042440453 is an apocalyptic number.

It is an amenable number.

1042440453 is a deficient number, since it is larger than the sum of its proper divisors (543842427).

1042440453 is a wasteful number, since it uses less digits than its factorization.

1042440453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4969 (or 4966 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 1042440453 is about 32286.8464393784. The cubic root of 1042440453 is about 1013.9512744580.

Adding to 1042440453 its reverse (3540442401), we get a palindrome (4582882854).

The spelling of 1042440453 in words is "one billion, forty-two million, four hundred forty thousand, four hundred fifty-three".