11142605 has 4 divisors (see below), whose sum is σ = 13371132. Its totient is φ = 8914080.

The previous prime is 11142581. The next prime is 11142613. The reversal of 11142605 is 50624111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4072324 + 7070281 = 2018^2 + 2659^2 .

It is not a de Polignac number, because 11142605 - 2¹⁶ = 11077069 is a prime.

It is a Duffinian number.

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 in 3 ways as a sum of consecutive naturals, for example, 1114256 + ... + 1114265.

It is an arithmetic number, because the mean of its divisors is an integer number (3342783).

Almost surely, 2^11142605 is an apocalyptic number.

It is an amenable number.

11142605 is a deficient number, since it is larger than the sum of its proper divisors (2228527).

11142605 is an equidigital number, since it uses as much as digits as its factorization.

11142605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2228526.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 11142605 is about 3338.0540738580. The cubic root of 11142605 is about 223.3549482805.

Adding to 11142605 its reverse (50624111), we get a palindrome (61766716).

The spelling of 11142605 in words is "eleven million, one hundred forty-two thousand, six hundred five".