12811406 has 4 divisors (see below), whose sum is σ = 19217112. Its totient is φ = 6405702.

The previous prime is 12811399. The next prime is 12811423. The reversal of 12811406 is 60411821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60411821 = 2687 ⋅22483.

It is a super-4 number, since 4×12811406⁴ (a number of 30 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3202850 + ... + 3202853.

It is an arithmetic number, because the mean of its divisors is an integer number (4804278).

Almost surely, 2^12811406 is an apocalyptic number.

12811406 is a deficient number, since it is larger than the sum of its proper divisors (6405706).

12811406 is an equidigital number, since it uses as much as digits as its factorization.

12811406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6405705.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 12811406 is about 3579.3024460082. The cubic root of 12811406 is about 233.9908804004.

The spelling of 12811406 in words is "twelve million, eight hundred eleven thousand, four hundred six".