1142432121 has 4 divisors (see below), whose sum is σ = 1523242832. Its totient is φ = 761621412.

The previous prime is 1142432117. The next prime is 1142432129. The reversal of 1142432121 is 1212342411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1142432121 - 2² = 1142432117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142432129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190405351 + ... + 190405356.

It is an arithmetic number, because the mean of its divisors is an integer number (380810708).

Almost surely, 2^1142432121 is an apocalyptic number.

It is an amenable number.

1142432121 is a deficient number, since it is larger than the sum of its proper divisors (380810711).

1142432121 is an equidigital number, since it uses as much as digits as its factorization.

1142432121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380810710.

The product of its digits is 384, while the sum is 21.

The square root of 1142432121 is about 33799.8834465446. The cubic root of 1142432121 is about 1045.3862940037.

Adding to 1142432121 its reverse (1212342411), we get a palindrome (2354774532).

The spelling of 1142432121 in words is "one billion, one hundred forty-two million, four hundred thirty-two thousand, one hundred twenty-one".