1231412442 has 128 divisors (see below), whose sum is σ = 3001743360. Its totient is φ = 332881920.

The previous prime is 1231412407. The next prime is 1231412449. The reversal of 1231412442 is 2442141321.

It is not an unprimeable number, because it can be changed into a prime (1231412449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1191558 + ... + 1192590.

It is an arithmetic number, because the mean of its divisors is an integer number (23451120).

Almost surely, 2^1231412442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231412442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1500871680).

1231412442 is an abundant number, since it is smaller than the sum of its proper divisors (1770330918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231412442 is a wasteful number, since it uses less digits than its factorization.

1231412442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128.

The product of its digits is 1536, while the sum is 24.

The square root of 1231412442 is about 35091.4867453632. The cubic root of 1231412442 is about 1071.8512343916.

Adding to 1231412442 its reverse (2442141321), we get a palindrome (3673553763).

The spelling of 1231412442 in words is "one billion, two hundred thirty-one million, four hundred twelve thousand, four hundred forty-two".