12551863 has 8 divisors (see below), whose sum is σ = 12907440. Its totient is φ = 12198720.

The previous prime is 12551857. The next prime is 12551873. The reversal of 12551863 is 36815521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12551863 - 2⁹ = 12551351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15556 + ... + 16342.

It is an arithmetic number, because the mean of its divisors is an integer number (1613430).

Almost surely, 2^12551863 is an apocalyptic number.

12551863 is a deficient number, since it is larger than the sum of its proper divisors (355577).

12551863 is an equidigital number, since it uses as much as digits as its factorization.

12551863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217.

The product of its digits is 7200, while the sum is 31.

The square root of 12551863 is about 3542.8608496524. The cubic root of 12551863 is about 232.3999677589.

The spelling of 12551863 in words is "twelve million, five hundred fifty-one thousand, eight hundred sixty-three".