1243221342 has 32 divisors (see below), whose sum is σ = 2724465024. Its totient is φ = 375069600.

The previous prime is 1243221307. The next prime is 1243221347. The reversal of 1243221342 is 2431223421.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243221347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26509 + ... + 56472.

It is an arithmetic number, because the mean of its divisors is an integer number (85139532).

Almost surely, 2^1243221342 is an apocalyptic number.

1243221342 is an abundant number, since it is smaller than the sum of its proper divisors (1481243682).

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

1243221342 is a wasteful number, since it uses less digits than its factorization.

1243221342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83224.

The product of its digits is 2304, while the sum is 24.

The square root of 1243221342 is about 35259.3440381412. The cubic root of 1243221342 is about 1075.2665910302.

Adding to 1243221342 its reverse (2431223421), we get a palindrome (3674444763).

The spelling of 1243221342 in words is "one billion, two hundred forty-three million, two hundred twenty-one thousand, three hundred forty-two".