12470809 has 16 divisors (see below), whose sum is σ = 14433552. Its totient is φ = 10672128.

The previous prime is 12470803. The next prime is 12470831. The reversal of 12470809 is 90807421.

12470809 = T₂₂₂ + T₂₂₃ + ... + T₄₄₀.

12470809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 944784 + 11526025 = 972^2 + 3395^2 .

It is a cyclic number.

It is not a de Polignac number, because 12470809 - 2⁷ = 12470681 is a prime.

It is a super-2 number, since 2×12470809² = 311042154228962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12470803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15747 + ... + 16519.

It is an arithmetic number, because the mean of its divisors is an integer number (902097).

Almost surely, 2^12470809 is an apocalyptic number.

It is an amenable number.

12470809 is a deficient number, since it is larger than the sum of its proper divisors (1962743).

12470809 is a wasteful number, since it uses less digits than its factorization.

12470809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 12470809 is about 3531.4032621608. The cubic root of 12470809 is about 231.8986440436.

The spelling of 12470809 in words is "twelve million, four hundred seventy thousand, eight hundred nine".