11123642 has 4 divisors (see below), whose sum is σ = 16685466. Its totient is φ = 5561820.

The previous prime is 11123639. The next prime is 11123647. The reversal of 11123642 is 24632111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24632111 = 7 ⋅3518873.

It can be written as a sum of positive squares in only one way, i.e., 9431041 + 1692601 = 3071^2 + 1301^2 .

It is a super-2 number, since 2×11123642² = 247470822688328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11123647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780909 + ... + 2780912.

Almost surely, 2^11123642 is an apocalyptic number.

11123642 is a deficient number, since it is larger than the sum of its proper divisors (5561824).

11123642 is an equidigital number, since it uses as much as digits as its factorization.

11123642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5561823.

The product of its digits is 288, while the sum is 20.

The square root of 11123642 is about 3335.2124370121. The cubic root of 11123642 is about 223.2281710780.

Adding to 11123642 its reverse (24632111), we get a palindrome (35755753).

It can be divided in two parts, 111 and 23642, that multiplied together give a palindrome (2624262).

The spelling of 11123642 in words is "eleven million, one hundred twenty-three thousand, six hundred forty-two".