1242787938 has 32 divisors (see below), whose sum is σ = 2841851520. Its totient is φ = 354933120.

The previous prime is 1242787933. The next prime is 1242787951. The reversal of 1242787938 is 8397872421.

It is not an unprimeable number, because it can be changed into a prime (1242787933) 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, 130168 + ... + 139388.

It is an arithmetic number, because the mean of its divisors is an integer number (88807860).

Almost surely, 2^1242787938 is an apocalyptic number.

1242787938 is an abundant number, since it is smaller than the sum of its proper divisors (1599063582).

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

1242787938 is a wasteful number, since it uses less digits than its factorization.

1242787938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12442.

The product of its digits is 1354752, while the sum is 51.

The square root of 1242787938 is about 35253.1975571011. The cubic root of 1242787938 is about 1075.1416256169.

The spelling of 1242787938 in words is "one billion, two hundred forty-two million, seven hundred eighty-seven thousand, nine hundred thirty-eight".