1131442421 has 8 divisors (see below), whose sum is σ = 1156083840. Its totient is φ = 1106824768.

The previous prime is 1131442399. The next prime is 1131442441. The reversal of 1131442421 is 1242441311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131442421 - 2²² = 1127248117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131442441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118010 + ... + 127236.

It is an arithmetic number, because the mean of its divisors is an integer number (144510480).

Almost surely, 2^1131442421 is an apocalyptic number.

It is an amenable number.

1131442421 is a deficient number, since it is larger than the sum of its proper divisors (24641419).

1131442421 is an equidigital number, since it uses as much as digits as its factorization.

1131442421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11883.

The product of its digits is 768, while the sum is 23.

The square root of 1131442421 is about 33636.9205041127. The cubic root of 1131442421 is about 1042.0234339701.

Adding to 1131442421 its reverse (1242441311), we get a palindrome (2373883732).

It can be divided in two parts, 11314 and 42421, that added together give a palindrome (53735).

The spelling of 1131442421 in words is "one billion, one hundred thirty-one million, four hundred forty-two thousand, four hundred twenty-one".