12887604 has 18 divisors (see below), whose sum is σ = 32577090. Its totient is φ = 4295856.

The previous prime is 12887603. The next prime is 12887617. The reversal of 12887604 is 40678821.

Added to its reverse (40678821) it gives a triangular number (53566425 = T₁₀₃₅₀).

It can be written as a sum of positive squares in only one way, i.e., 7551504 + 5336100 = 2748^2 + 2310^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 357989 = 12887604 / (1 + 2 + 8 + 8 + 7 + 6 + 0 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12887603) 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, 178959 + ... + 179030.

Almost surely, 2^12887604 is an apocalyptic number.

It is an amenable number.

12887604 is an abundant number, since it is smaller than the sum of its proper divisors (19689486).

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

12887604 is a wasteful number, since it uses less digits than its factorization.

12887604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357999 (or 357994 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 12887604 is about 3589.9309185554. The cubic root of 12887604 is about 234.4538638072.

Adding to 12887604 its reverse (40678821), we get a triangular number (53566425 = T₁₀₃₅₀).

The spelling of 12887604 in words is "twelve million, eight hundred eighty-seven thousand, six hundred four".