12071409 has 16 divisors (see below), whose sum is σ = 18444288. Its totient is φ = 6879312.

The previous prime is 12071407. The next prime is 12071429. The reversal of 12071409 is 90417021.

12071409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12071409 - 2¹ = 12071407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12071401) 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, 12274 + ... + 13220.

It is an arithmetic number, because the mean of its divisors is an integer number (1152768).

Almost surely, 2^12071409 is an apocalyptic number.

It is an amenable number.

12071409 is a deficient number, since it is larger than the sum of its proper divisors (6372879).

12071409 is an equidigital number, since it uses as much as digits as its factorization.

12071409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 12071409 is about 3474.3933283381. The cubic root of 12071409 is about 229.3960778963.

The spelling of 12071409 in words is "twelve million, seventy-one thousand, four hundred nine".