12978504 has 96 divisors (see below), whose sum is σ = 43842240. Its totient is φ = 3369600.

The previous prime is 12978499. The next prime is 12978517. The reversal of 12978504 is 40587921.

Added to its reverse (40587921) it gives a triangular number (53566425 = T₁₀₃₅₀).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4374 + ... + 6714.

It is an arithmetic number, because the mean of its divisors is an integer number (456690).

Almost surely, 2^12978504 is an apocalyptic number.

12978504 is a gapful number since it is divisible by the number (14) 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 12978504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21921120).

12978504 is an abundant number, since it is smaller than the sum of its proper divisors (30863736).

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

12978504 is a wasteful number, since it uses less digits than its factorization.

12978504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371 (or 2364 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 12978504 is about 3602.5690833071. The cubic root of 12978504 is about 235.0037965284.

Adding to 12978504 its reverse (40587921), we get a triangular number (53566425 = T₁₀₃₅₀).

It can be divided in two parts, 1297 and 8504, that added together give a square (9801 = 99²).

The spelling of 12978504 in words is "twelve million, nine hundred seventy-eight thousand, five hundred four".