1242043 has 4 divisors (see below), whose sum is σ = 1354968. Its totient is φ = 1129120.

The previous prime is 1242029. The next prime is 1242061. The reversal of 1242043 is 3402421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3402421 = 11 ⋅309311.

It is a cyclic number.

It is not a de Polignac number, because 1242043 - 2¹³ = 1233851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56446 + ... + 56467.

It is an arithmetic number, because the mean of its divisors is an integer number (338742).

2^1242043 is an apocalyptic number.

1242043 is a deficient number, since it is larger than the sum of its proper divisors (112925).

1242043 is a wasteful number, since it uses less digits than its factorization.

1242043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112924.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1242043 is about 1114.4698291116. The cubic root of 1242043 is about 107.4926766239.

Adding to 1242043 its reverse (3402421), we get a palindrome (4644464).

The spelling of 1242043 in words is "one million, two hundred forty-two thousand, forty-three".