11478131 has 4 divisors (see below), whose sum is σ = 13117872. Its totient is φ = 9838392.

The previous prime is 11478101. The next prime is 11478143. The reversal of 11478131 is 13187411.

11478131 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13187411 = 367 ⋅35933.

It is a cyclic number.

It is not a de Polignac number, because 11478131 - 2⁶ = 11478067 is a prime.

It is a super-2 number, since 2×11478131² = 263494982506322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11478131.

It is not an unprimeable number, because it can be changed into a prime (11478101) 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, 819860 + ... + 819873.

It is an arithmetic number, because the mean of its divisors is an integer number (3279468).

Almost surely, 2^11478131 is an apocalyptic number.

11478131 is a deficient number, since it is larger than the sum of its proper divisors (1639741).

11478131 is an equidigital number, since it uses as much as digits as its factorization.

11478131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639740.

The product of its digits is 672, while the sum is 26.

The square root of 11478131 is about 3387.9390490385. The cubic root of 11478131 is about 225.5747020218.

The spelling of 11478131 in words is "eleven million, four hundred seventy-eight thousand, one hundred thirty-one".