1242322140 has 96 divisors (see below), whose sum is σ = 3598672896. Its totient is φ = 320002560.

The previous prime is 1242322139. The next prime is 1242322153. The reversal of 1242322140 is 412232421.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250929 + ... + 255831.

It is an arithmetic number, because the mean of its divisors is an integer number (37486176).

Almost surely, 2^1242322140 is an apocalyptic number.

1242322140 is a gapful number since it is divisible by the number (10) 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 1242322140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1799336448).

1242322140 is an abundant number, since it is smaller than the sum of its proper divisors (2356350756).

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

1242322140 is a wasteful number, since it uses less digits than its factorization.

1242322140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5059 (or 5057 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1242322140 is about 35246.5904734061. The cubic root of 1242322140 is about 1075.0072874934.

Adding to 1242322140 its reverse (412232421), we get a palindrome (1654554561).

The spelling of 1242322140 in words is "one billion, two hundred forty-two million, three hundred twenty-two thousand, one hundred forty".