1203542 has 4 divisors (see below), whose sum is σ = 1805316. Its totient is φ = 601770.

The previous prime is 1203533. The next prime is 1203557. The reversal of 1203542 is 2453021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2453021 = 43 ⋅57047.

It is a self number, because there is not a number n which added to its sum of digits gives 1203542.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 300884 + ... + 300887.

It is an arithmetic number, because the mean of its divisors is an integer number (451329).

2^1203542 is an apocalyptic number.

1203542 is a deficient number, since it is larger than the sum of its proper divisors (601774).

1203542 is an equidigital number, since it uses as much as digits as its factorization.

1203542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601773.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 1203542 is about 1097.0606181976. The cubic root of 1203542 is about 106.3703080132.

Adding to 1203542 its reverse (2453021), we get a palindrome (3656563).

The spelling of 1203542 in words is "one million, two hundred three thousand, five hundred forty-two".