12552781 has 8 divisors (see below), whose sum is σ = 12859200. Its totient is φ = 12249600.

The previous prime is 12552773. The next prime is 12552791. The reversal of 12552781 is 18725521.

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 12552781 - 2³ = 12552773 is a prime.

It is a super-2 number, since 2×12552781² = 315144621667922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12552751) 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, 8205 + ... + 9613.

It is an arithmetic number, because the mean of its divisors is an integer number (1607400).

Almost surely, 2^12552781 is an apocalyptic number.

It is an amenable number.

12552781 is a deficient number, since it is larger than the sum of its proper divisors (306419).

12552781 is a wasteful number, since it uses less digits than its factorization.

12552781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619.

The product of its digits is 5600, while the sum is 31.

The square root of 12552781 is about 3542.9904035998. The cubic root of 12552781 is about 232.4056332650.

The spelling of 12552781 in words is "twelve million, five hundred fifty-two thousand, seven hundred eighty-one".