1242133308 has 144 divisors (see below), whose sum is σ = 3554643456. Its totient is φ = 362862720.

The previous prime is 1242133297. The next prime is 1242133309. The reversal of 1242133308 is 8033312421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242133309) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1797243 + ... + 1797933.

It is an arithmetic number, because the mean of its divisors is an integer number (24685024).

Almost surely, 2^1242133308 is an apocalyptic number.

1242133308 is a gapful number since it is divisible by the number (18) 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 1242133308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1777321728).

1242133308 is an abundant number, since it is smaller than the sum of its proper divisors (2312510148).

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

1242133308 is a wasteful number, since it uses less digits than its factorization.

1242133308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904 (or 899 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1242133308 is about 35243.9116444245. The cubic root of 1242133308 is about 1074.9528179761.

Adding to 1242133308 its reverse (8033312421), we get a palindrome (9275445729).

The spelling of 1242133308 in words is "one billion, two hundred forty-two million, one hundred thirty-three thousand, three hundred eight".