11955487 has 4 divisors (see below), whose sum is σ = 11962936. Its totient is φ = 11948040.

The previous prime is 11955467. The next prime is 11955499. The reversal of 11955487 is 78455911.

It is a happy number.

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: 78455911 = 109 ⋅719779.

It is a cyclic number.

It is not a de Polignac number, because 11955487 - 2¹¹ = 11953439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11955407) 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, 213 + ... + 4894.

It is an arithmetic number, because the mean of its divisors is an integer number (2990734).

Almost surely, 2^11955487 is an apocalyptic number.

11955487 is a deficient number, since it is larger than the sum of its proper divisors (7449).

11955487 is an equidigital number, since it uses as much as digits as its factorization.

11955487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7448.

The product of its digits is 50400, while the sum is 40.

The square root of 11955487 is about 3457.6707477723. The cubic root of 11955487 is about 228.6594162925.

The spelling of 11955487 in words is "eleven million, nine hundred fifty-five thousand, four hundred eighty-seven".