1543442 has 16 divisors (see below), whose sum is σ = 2404512. Its totient is φ = 742560.

The previous prime is 1543441. The next prime is 1543463. The reversal of 1543442 is 2443451.

It is not an unprimeable number, because it can be changed into a prime (1543441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11198 + ... + 11334.

It is an arithmetic number, because the mean of its divisors is an integer number (150282).

2^1543442 is an apocalyptic number.

1543442 is a deficient number, since it is larger than the sum of its proper divisors (861070).

1543442 is a wasteful number, since it uses less digits than its factorization.

1543442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313.

The product of its digits is 1920, while the sum is 23.

The square root of 1543442 is about 1242.3534118760. The cubic root of 1543442 is about 115.5660061363.

Adding to 1543442 its reverse (2443451), we get a palindrome (3986893).

Subtracting 1543442 from its reverse (2443451), we obtain a palindrome (900009).

The spelling of 1543442 in words is "one million, five hundred forty-three thousand, four hundred forty-two".