12551636 has 12 divisors (see below), whose sum is σ = 22048320. Its totient is φ = 6252120.

The previous prime is 12551603. The next prime is 12551639. The reversal of 12551636 is 63615521.

It is a super-3 number, since 3×12551636³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12551599 and 12551608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4706 + ... + 6873.

It is an arithmetic number, because the mean of its divisors is an integer number (1837360).

Almost surely, 2^12551636 is an apocalyptic number.

It is an amenable number.

12551636 is a deficient number, since it is larger than the sum of its proper divisors (9496684).

12551636 is a wasteful number, since it uses less digits than its factorization.

12551636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11854 (or 11852 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 12551636 is about 3542.8288132508. The cubic root of 12551636 is about 232.3985667687.

The spelling of 12551636 in words is "twelve million, five hundred fifty-one thousand, six hundred thirty-six".