1243042 has 4 divisors (see below), whose sum is σ = 1864566. Its totient is φ = 621520.

The previous prime is 1243013. The next prime is 1243093. The reversal of 1243042 is 2403421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2403421 = 71 ⋅33851.

It can be written as a sum of positive squares in only one way, i.e., 1185921 + 57121 = 1089^2 + 239^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310759 + ... + 310762.

2^1243042 is an apocalyptic number.

1243042 is a deficient number, since it is larger than the sum of its proper divisors (621524).

1243042 is an equidigital number, since it uses as much as digits as its factorization.

1243042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621523.

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

The square root of 1243042 is about 1114.9179341996. The cubic root of 1243042 is about 107.5214884031.

Adding to 1243042 its reverse (2403421), we get a palindrome (3646463).

The spelling of 1243042 in words is "one million, two hundred forty-three thousand, forty-two".