12031507 has 4 divisors (see below), whose sum is σ = 12554640. Its totient is φ = 11508376.

The previous prime is 12031493. The next prime is 12031517. The reversal of 12031507 is 70513021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70513021 = 977 ⋅72173.

It is a cyclic number.

It is not a de Polignac number, because 12031507 - 2¹⁵ = 11998739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12031517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261532 + ... + 261577.

It is an arithmetic number, because the mean of its divisors is an integer number (3138660).

Almost surely, 2^12031507 is an apocalyptic number.

12031507 is a deficient number, since it is larger than the sum of its proper divisors (523133).

12031507 is an equidigital number, since it uses as much as digits as its factorization.

12031507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523132.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 12031507 is about 3468.6462777285. The cubic root of 12031507 is about 229.1430429128.

Adding to 12031507 its reverse (70513021), we get a palindrome (82544528).

The spelling of 12031507 in words is "twelve million, thirty-one thousand, five hundred seven".