11780131 has 4 divisors (see below), whose sum is σ = 12851064. Its totient is φ = 10709200.

The previous prime is 11780123. The next prime is 11780147. The reversal of 11780131 is 13108711.

11780131 = T₁₄₅₈ + T₁₄₅₉ + ... + T₁₄₆₈.

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

It is a cyclic number.

It is not a de Polignac number, because 11780131 - 2³ = 11780123 is a prime.

It is a super-2 number, since 2×11780131² = 277542972754322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11780101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535450 + ... + 535471.

It is an arithmetic number, because the mean of its divisors is an integer number (3212766).

Almost surely, 2^11780131 is an apocalyptic number.

11780131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11780131 is a deficient number, since it is larger than the sum of its proper divisors (1070933).

11780131 is a wasteful number, since it uses less digits than its factorization.

11780131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070932.

The product of its (nonzero) digits is 168, while the sum is 22.

The square root of 11780131 is about 3432.2195442600. The cubic root of 11780131 is about 227.5359585716.

Adding to 11780131 its reverse (13108711), we get a palindrome (24888842).

It can be divided in two parts, 11780 and 131, that added together give a palindrome (11911).

The spelling of 11780131 in words is "eleven million, seven hundred eighty thousand, one hundred thirty-one".