11942563 has 4 divisors (see below), whose sum is σ = 11952360. Its totient is φ = 11932768.

The previous prime is 11942531. The next prime is 11942597. The reversal of 11942563 is 36524911.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 36524911 = 829 ⋅44059.

It is a cyclic number.

It is not a de Polignac number, because 11942563 - 2⁵ = 11942531 is a prime.

It is a super-2 number, since 2×11942563² = 285249622017938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11942503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2758 + ... + 5611.

It is an arithmetic number, because the mean of its divisors is an integer number (2988090).

Almost surely, 2^11942563 is an apocalyptic number.

11942563 is a deficient number, since it is larger than the sum of its proper divisors (9797).

11942563 is an equidigital number, since it uses as much as digits as its factorization.

11942563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9796.

The product of its digits is 6480, while the sum is 31.

The square root of 11942563 is about 3455.8013542448. The cubic root of 11942563 is about 228.5769922195.

The spelling of 11942563 in words is "eleven million, nine hundred forty-two thousand, five hundred sixty-three".