1543842 has 24 divisors (see below), whose sum is σ = 3369600. Its totient is φ = 510840.

The previous prime is 1543823. The next prime is 1543859. The reversal of 1543842 is 2483451.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3367 + ... + 3797.

It is an arithmetic number, because the mean of its divisors is an integer number (140400).

2^1543842 is an apocalyptic number.

1543842 is an abundant number, since it is smaller than the sum of its proper divisors (1825758).

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

1543842 is a wasteful number, since it uses less digits than its factorization.

1543842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 635 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 1543842 is about 1242.5143862346. The cubic root of 1543842 is about 115.5759886752.

The spelling of 1543842 in words is "one million, five hundred forty-three thousand, eight hundred forty-two".