12071511 has 28 divisors (see below), whose sum is σ = 18755880. Its totient is φ = 7756560.

The previous prime is 12071503. The next prime is 12071531. The reversal of 12071511 is 11517021.

It is a happy number.

12071511 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12071511 - 2³ = 12071503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12071531) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 20856 + ... + 21426.

Almost surely, 2^12071511 is an apocalyptic number.

12071511 is a deficient number, since it is larger than the sum of its proper divisors (6684369).

12071511 is an frugal number, since it uses more digits than its factorization.

12071511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 12071511 is about 3474.4080071287. The cubic root of 12071511 is about 229.3967240052.

Adding to 12071511 its reverse (11517021), we get a palindrome (23588532).

It can be divided in two parts, 120 and 71511, that added together give a triangular number (71631 = T₃₇₈).

The spelling of 12071511 in words is "twelve million, seventy-one thousand, five hundred eleven".