4012809 has 4 divisors (see below), whose sum is σ = 5350416. Its totient is φ = 2675204.

The previous prime is 4012783. The next prime is 4012829. The reversal of 4012809 is 9082104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4012809 - 2⁷ = 4012681 is a prime.

It is a super-2 number, since 2×4012809² = 32205272140962, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (4012829) 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, 668799 + ... + 668804.

It is an arithmetic number, because the mean of its divisors is an integer number (1337604).

Almost surely, 2^4012809 is an apocalyptic number.

It is an amenable number.

4012809 is a deficient number, since it is larger than the sum of its proper divisors (1337607).

4012809 is a wasteful number, since it uses less digits than its factorization.

4012809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337606.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 4012809 is about 2003.1996904952. The cubic root of 4012809 is about 158.9093664868.

The spelling of 4012809 in words is "four million, twelve thousand, eight hundred nine".