1231345442 has 8 divisors (see below), whose sum is σ = 1858078656. Its totient is φ = 611985892.

The previous prime is 1231345361. The next prime is 1231345469. The reversal of 1231345442 is 2445431321.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1842998 + ... + 1843665.

It is an arithmetic number, because the mean of its divisors is an integer number (232259832).

Almost surely, 2^1231345442 is an apocalyptic number.

1231345442 is a deficient number, since it is larger than the sum of its proper divisors (626733214).

1231345442 is a wasteful number, since it uses less digits than its factorization.

1231345442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686832.

The product of its digits is 11520, while the sum is 29.

The square root of 1231345442 is about 35090.5320848801. The cubic root of 1231345442 is about 1071.8317945644.

Adding to 1231345442 its reverse (2445431321), we get a palindrome (3676776763).

The spelling of 1231345442 in words is "one billion, two hundred thirty-one million, three hundred forty-five thousand, four hundred forty-two".