1042244021 has 32 divisors (see below), whose sum is σ = 1331420160. Its totient is φ = 793545984.

The previous prime is 1042243967. The next prime is 1042244033. The reversal of 1042244021 is 1204422401.

It is not a de Polignac number, because 1042244021 - 2¹⁰ = 1042242997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1042243984 and 1042244002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042244051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1221431 + ... + 1222283.

It is an arithmetic number, because the mean of its divisors is an integer number (41606880).

Almost surely, 2^1042244021 is an apocalyptic number.

It is an amenable number.

1042244021 is a deficient number, since it is larger than the sum of its proper divisors (289176139).

1042244021 is a wasteful number, since it uses less digits than its factorization.

1042244021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1042244021 is about 32283.8043142378. The cubic root of 1042244021 is about 1013.8875825743.

Adding to 1042244021 its reverse (1204422401), we get a palindrome (2246666422).

The spelling of 1042244021 in words is "one billion, forty-two million, two hundred forty-four thousand, twenty-one".