1801391342 has 4 divisors (see below), whose sum is σ = 2702087016. Its totient is φ = 900695670.

The previous prime is 1801391329. The next prime is 1801391351. The reversal of 1801391342 is 2431931081.

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

It is a junction number, because it is equal to n+sod(n) for n = 1801391299 and 1801391308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450347834 + ... + 450347837.

It is an arithmetic number, because the mean of its divisors is an integer number (675521754).

Almost surely, 2^1801391342 is an apocalyptic number.

1801391342 is a deficient number, since it is larger than the sum of its proper divisors (900695674).

1801391342 is an equidigital number, since it uses as much as digits as its factorization.

1801391342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900695673.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1801391342 is about 42442.8008265242. The cubic root of 1801391342 is about 1216.7537414714.

The spelling of 1801391342 in words is "one billion, eight hundred one million, three hundred ninety-one thousand, three hundred forty-two".