1242112420 has 12 divisors (see below), whose sum is σ = 2608436124. Its totient is φ = 496844960.

The previous prime is 1242112409. The next prime is 1242112477. The reversal of 1242112420 is 242112421.

It can be written as a sum of positive squares in 2 ways, for example, as 679853476 + 562258944 = 26074^2 + 23712^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31052791 + ... + 31052830.

It is an arithmetic number, because the mean of its divisors is an integer number (217369677).

Almost surely, 2^1242112420 is an apocalyptic number.

1242112420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242112420 is an abundant number, since it is smaller than the sum of its proper divisors (1366323704).

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

1242112420 is a wasteful number, since it uses less digits than its factorization.

1242112420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62105630 (or 62105628 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1242112420 is about 35243.6153083080. The cubic root of 1242112420 is about 1074.9467923908.

Adding to 1242112420 its reverse (242112421), we get a palindrome (1484224841).

Subtracting from 1242112420 its reverse (242112421), we obtain a palindrome (999999999).

The spelling of 1242112420 in words is "one billion, two hundred forty-two million, one hundred twelve thousand, four hundred twenty".