12309071 has 8 divisors (see below), whose sum is σ = 13600224. Its totient is φ = 11080960.

The previous prime is 12309053. The next prime is 12309083. The reversal of 12309071 is 17090321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12309071 - 2¹⁸ = 12046927 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12309001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15350 + ... + 16131.

It is an arithmetic number, because the mean of its divisors is an integer number (1700028).

Almost surely, 2^12309071 is an apocalyptic number.

12309071 is a deficient number, since it is larger than the sum of its proper divisors (1291153).

12309071 is a wasteful number, since it uses less digits than its factorization.

12309071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31521.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 12309071 is about 3508.4285656117. The cubic root of 12309071 is about 230.8917554110.

Adding to 12309071 its reverse (17090321), we get a palindrome (29399392).

It can be divided in two parts, 1230 and 9071, that added together give a palindrome (10301).

The spelling of 12309071 in words is "twelve million, three hundred nine thousand, seventy-one".