12151512 has 64 divisors (see below), whose sum is σ = 34149600. Its totient is φ = 4003200.

The previous prime is 12151511. The next prime is 12151523. The reversal of 12151512 is 21515121.

12151512 is a `hidden beast` number, since 1 + 2 + 151 + 512 = 666.

It is a super-2 number, since 2×12151512² = 295318487772288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12151511) 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 15 ways as a sum of consecutive naturals, for example, 21538 + ... + 22094.

Almost surely, 2^12151512 is an apocalyptic number.

12151512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12151512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17074800).

12151512 is an abundant number, since it is smaller than the sum of its proper divisors (21998088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12151512 is a wasteful number, since it uses less digits than its factorization.

12151512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673 (or 663 counting only the distinct ones).

The product of its digits is 100, while the sum is 18.

The square root of 12151512 is about 3485.9018919069. The cubic root of 12151512 is about 229.9023656177.

Adding to 12151512 its reverse (21515121), we get a palindrome (33666633).

The spelling of 12151512 in words is "twelve million, one hundred fifty-one thousand, five hundred twelve".