11142603 has 20 divisors (see below), whose sum is σ = 17371728. Its totient is φ = 7104240.

The previous prime is 11142581. The next prime is 11142613. The reversal of 11142603 is 30624111.

It is a happy number.

It is not a de Polignac number, because 11142603 - 2⁶ = 11142539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11142613) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 1128 + ... + 4853.

Almost surely, 2^11142603 is an apocalyptic number.

11142603 is a deficient number, since it is larger than the sum of its proper divisors (6229125).

11142603 is an equidigital number, since it uses as much as digits as its factorization.

11142603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6016 (or 6007 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 11142603 is about 3338.0537742823. The cubic root of 11142603 is about 223.3549349171.

Adding to 11142603 its reverse (30624111), we get a palindrome (41766714).

The spelling of 11142603 in words is "eleven million, one hundred forty-two thousand, six hundred three".