1042231421 has 24 divisors (see below), whose sum is σ = 1344333600. Its totient is φ = 798789600.

The previous prime is 1042231417. The next prime is 1042231447. The reversal of 1042231421 is 1241322401.

It is not a de Polignac number, because 1042231421 - 2² = 1042231417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1042231393 and 1042231402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042231451) 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, 17030 + ... + 48728.

It is an arithmetic number, because the mean of its divisors is an integer number (56013900).

Almost surely, 2^1042231421 is an apocalyptic number.

1042231421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1042231421 is a deficient number, since it is larger than the sum of its proper divisors (302102179).

1042231421 is a wasteful number, since it uses less digits than its factorization.

1042231421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31785 (or 31778 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1042231421 is about 32283.6091693602. The cubic root of 1042231421 is about 1013.8834968276.

Adding to 1042231421 its reverse (1241322401), we get a palindrome (2283553822).

The spelling of 1042231421 in words is "one billion, forty-two million, two hundred thirty-one thousand, four hundred twenty-one".