12008731 has 4 divisors (see below), whose sum is σ = 13724272. Its totient is φ = 10293192.

The previous prime is 12008729. The next prime is 12008771. The reversal of 12008731 is 13780021.

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

It is not a de Polignac number, because 12008731 - 2¹ = 12008729 is a prime.

It is a super-2 number, since 2×12008731² = 288419240460722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12008771) 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, 857760 + ... + 857773.

It is an arithmetic number, because the mean of its divisors is an integer number (3431068).

Almost surely, 2^12008731 is an apocalyptic number.

12008731 is a deficient number, since it is larger than the sum of its proper divisors (1715541).

12008731 is an equidigital number, since it uses as much as digits as its factorization.

12008731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715540.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 12008731 is about 3465.3615972940. The cubic root of 12008731 is about 228.9983600500.

Adding to 12008731 its reverse (13780021), we get a palindrome (25788752).

The spelling of 12008731 in words is "twelve million, eight thousand, seven hundred thirty-one".