12811402 has 4 divisors (see below), whose sum is σ = 19217106. Its totient is φ = 6405700.

The previous prime is 12811399. The next prime is 12811423. The reversal of 12811402 is 20411821.

It is a happy number.

12811402 is digitally balanced in base 2, 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: 20411821 = 127 ⋅160723.

It can be written as a sum of positive squares in only one way, i.e., 9235521 + 3575881 = 3039^2 + 1891^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12811402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202849 + ... + 3202852.

Almost surely, 2^12811402 is an apocalyptic number.

12811402 is a deficient number, since it is larger than the sum of its proper divisors (6405704).

12811402 is an equidigital number, since it uses as much as digits as its factorization.

12811402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6405703.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 12811402 is about 3579.3018872400. The cubic root of 12811402 is about 233.9908560481.

The spelling of 12811402 in words is "twelve million, eight hundred eleven thousand, four hundred two".