12551004 has 48 divisors (see below), whose sum is σ = 32739840. Its totient is φ = 4158000.

The previous prime is 12551003. The next prime is 12551009. The reversal of 12551004 is 40015521.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26877 + ... + 27339.

It is an arithmetic number, because the mean of its divisors is an integer number (682080).

Almost surely, 2^12551004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12551004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16369920).

12551004 is an abundant number, since it is smaller than the sum of its proper divisors (20188836).

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

12551004 is a wasteful number, since it uses less digits than its factorization.

12551004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727 (or 719 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 12551004 is about 3542.7396178664. The cubic root of 12551004 is about 232.3946661256.

Adding to 12551004 its reverse (40015521), we get a palindrome (52566525).

The spelling of 12551004 in words is "twelve million, five hundred fifty-one thousand, four".