1242032140 has 12 divisors (see below), whose sum is σ = 2608267536. Its totient is φ = 496812848.

The previous prime is 1242032119. The next prime is 1242032149. The reversal of 1242032140 is 412302421.

It is not an unprimeable number, because it can be changed into a prime (1242032149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31050784 + ... + 31050823.

It is an arithmetic number, because the mean of its divisors is an integer number (217355628).

Almost surely, 2^1242032140 is an apocalyptic number.

1242032140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242032140 is an abundant number, since it is smaller than the sum of its proper divisors (1366235396).

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

1242032140 is a wasteful number, since it uses less digits than its factorization.

1242032140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62101616 (or 62101614 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1242032140 is about 35242.4763602106. The cubic root of 1242032140 is about 1074.9236332988.

Adding to 1242032140 its reverse (412302421), we get a palindrome (1654334561).

The spelling of 1242032140 in words is "one billion, two hundred forty-two million, thirty-two thousand, one hundred forty".