12151278 has 12 divisors (see below), whose sum is σ = 26327808. Its totient is φ = 4050420.

The previous prime is 12151273. The next prime is 12151289. The reversal of 12151278 is 87215121.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12151273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 337518 + ... + 337553.

It is an arithmetic number, because the mean of its divisors is an integer number (2193984).

Almost surely, 2^12151278 is an apocalyptic number.

12151278 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12151278 is an abundant number, since it is smaller than the sum of its proper divisors (14176530).

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

12151278 is a wasteful number, since it uses less digits than its factorization.

12151278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675079 (or 675076 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 12151278 is about 3485.8683279780. The cubic root of 12151278 is about 229.9008898754.

Adding to 12151278 its reverse (87215121), we get a palindrome (99366399).

The spelling of 12151278 in words is "twelve million, one hundred fifty-one thousand, two hundred seventy-eight".