12820474 has 4 divisors (see below), whose sum is σ = 19230714. Its totient is φ = 6410236.

The previous prime is 12820427. The next prime is 12820481. The reversal of 12820474 is 47402821.

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

It can be written as a sum of positive squares in only one way, i.e., 8381025 + 4439449 = 2895^2 + 2107^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3205117 + ... + 3205120.

Almost surely, 2^12820474 is an apocalyptic number.

12820474 is a deficient number, since it is larger than the sum of its proper divisors (6410240).

12820474 is an equidigital number, since it uses as much as digits as its factorization.

12820474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6410239.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 12820474 is about 3580.5689492035. The cubic root of 12820474 is about 234.0460741573.

It can be divided in two parts, 128 and 20474, that added together give a palindrome (20602).

The spelling of 12820474 in words is "twelve million, eight hundred twenty thousand, four hundred seventy-four".