1239847342 has 4 divisors (see below), whose sum is σ = 1859771016. Its totient is φ = 619923670.

The previous prime is 1239847333. The next prime is 1239847379. The reversal of 1239847342 is 2437489321.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309961834 + ... + 309961837.

It is an arithmetic number, because the mean of its divisors is an integer number (464942754).

Almost surely, 2^1239847342 is an apocalyptic number.

1239847342 is a deficient number, since it is larger than the sum of its proper divisors (619923674).

1239847342 is an equidigital number, since it uses as much as digits as its factorization.

1239847342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619923673.

The product of its digits is 290304, while the sum is 43.

The square root of 1239847342 is about 35211.4660586577. The cubic root of 1239847342 is about 1074.2929815053.

The spelling of 1239847342 in words is "one billion, two hundred thirty-nine million, eight hundred forty-seven thousand, three hundred forty-two".