1242339192 has 96 divisors (see below), whose sum is σ = 3616002000. Its totient is φ = 383910912.

The previous prime is 1242339191. The next prime is 1242339199. The reversal of 1242339192 is 2919332421.

1242339192 is a `hidden beast` number, since 12 + 423 + 39 + 192 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242339191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74434 + ... + 89582.

Almost surely, 2^1242339192 is an apocalyptic number.

1242339192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242339192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1808001000).

1242339192 is an abundant number, since it is smaller than the sum of its proper divisors (2373662808).

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

1242339192 is a wasteful number, since it uses less digits than its factorization.

1242339192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15245 (or 15238 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 1242339192 is about 35246.8323683136. The cubic root of 1242339192 is about 1075.0122059548.

It can be divided in two parts, 12423 and 39192, that added together give a palindrome (51615).

The spelling of 1242339192 in words is "one billion, two hundred forty-two million, three hundred thirty-nine thousand, one hundred ninety-two".