12151530 has 24 divisors (see below), whose sum is σ = 31594212. Its totient is φ = 3240384.

The previous prime is 12151523. The next prime is 12151553. The reversal of 12151530 is 3515121.

12151530 is a `hidden beast` number, since 121 + 515 + 30 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12089529 + 62001 = 3477^2 + 249^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67419 + ... + 67598.

Almost surely, 2^12151530 is an apocalyptic number.

12151530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12151530 is an abundant number, since it is smaller than the sum of its proper divisors (19442682).

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

12151530 is a wasteful number, since it uses less digits than its factorization.

12151530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135030 (or 135027 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 12151530 is about 3485.9044737342. The cubic root of 12151530 is about 229.9024791355.

Adding to 12151530 its reverse (3515121), we get a palindrome (15666651).

The spelling of 12151530 in words is "twelve million, one hundred fifty-one thousand, five hundred thirty".