12151478 has 4 divisors (see below), whose sum is σ = 18227220. Its totient is φ = 6075738.

The previous prime is 12151471. The next prime is 12151483. The reversal of 12151478 is 87415121.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12151478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12151471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3037868 + ... + 3037871.

It is an arithmetic number, because the mean of its divisors is an integer number (4556805).

Almost surely, 2^12151478 is an apocalyptic number.

12151478 is a deficient number, since it is larger than the sum of its proper divisors (6075742).

12151478 is an equidigital number, since it uses as much as digits as its factorization.

12151478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6075741.

The product of its digits is 2240, while the sum is 29.

The square root of 12151478 is about 3485.8970151168. The cubic root of 12151478 is about 229.9021511948.

Adding to 12151478 its reverse (87415121), we get a palindrome (99566599).

The spelling of 12151478 in words is "twelve million, one hundred fifty-one thousand, four hundred seventy-eight".