12678154 has 4 divisors (see below), whose sum is σ = 19017234. Its totient is φ = 6339076.

The previous prime is 12678151. The next prime is 12678173. The reversal of 12678154 is 45187621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45187621 = 1319 ⋅34259.

It can be written as a sum of positive squares in only one way, i.e., 12285025 + 393129 = 3505^2 + 627^2 .

It is not an unprimeable number, because it can be changed into a prime (12678151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3169537 + ... + 3169540.

Almost surely, 2^12678154 is an apocalyptic number.

12678154 is a deficient number, since it is larger than the sum of its proper divisors (6339080).

12678154 is an equidigital number, since it uses as much as digits as its factorization.

12678154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6339079.

The product of its digits is 13440, while the sum is 34.

The square root of 12678154 is about 3560.6395492945. The cubic root of 12678154 is about 233.1768015901.

The spelling of 12678154 in words is "twelve million, six hundred seventy-eight thousand, one hundred fifty-four".