11856403 has 4 divisors (see below), whose sum is σ = 12768448. Its totient is φ = 10944360.

The previous prime is 11856373. The next prime is 11856409. The reversal of 11856403 is 30465811.

11856403 is digitally balanced in base 2 and base 3, because in such bases 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: 30465811 = 337 ⋅90403.

It is a cyclic number.

It is not a de Polignac number, because 11856403 - 2⁵ = 11856371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11856409) 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, 456003 + ... + 456028.

It is an arithmetic number, because the mean of its divisors is an integer number (3192112).

Almost surely, 2^11856403 is an apocalyptic number.

11856403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11856403 is a deficient number, since it is larger than the sum of its proper divisors (912045).

11856403 is an equidigital number, since it uses as much as digits as its factorization.

11856403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912044.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 11856403 is about 3443.3127943886. The cubic root of 11856403 is about 228.0259729824.

The spelling of 11856403 in words is "eleven million, eight hundred fifty-six thousand, four hundred three".