1242320142 has 32 divisors (see below), whose sum is σ = 2841149952. Its totient is φ = 354753504.

The previous prime is 1242320129. The next prime is 1242320143. The reversal of 1242320142 is 2410232421.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242320143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80568 + ... + 94740.

It is an arithmetic number, because the mean of its divisors is an integer number (88785936).

Almost surely, 2^1242320142 is an apocalyptic number.

1242320142 is an abundant number, since it is smaller than the sum of its proper divisors (1598829810).

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

1242320142 is a wasteful number, since it uses less digits than its factorization.

1242320142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16272.

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

The square root of 1242320142 is about 35246.5621302277. The cubic root of 1242320142 is about 1075.0067111894.

Adding to 1242320142 its reverse (2410232421), we get a palindrome (3652552563).

The spelling of 1242320142 in words is "one billion, two hundred forty-two million, three hundred twenty thousand, one hundred forty-two".