12781473 has 8 divisors (see below), whose sum is σ = 17060736. Its totient is φ = 8511600.

The previous prime is 12781459. The next prime is 12781487. The reversal of 12781473 is 37418721.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12781459) and next prime (12781487).

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

It is not a de Polignac number, because 12781473 - 2⁵ = 12781441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12781423) 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, 1963 + ... + 5423.

It is an arithmetic number, because the mean of its divisors is an integer number (2132592).

Almost surely, 2^12781473 is an apocalyptic number.

It is an amenable number.

12781473 is a deficient number, since it is larger than the sum of its proper divisors (4279263).

12781473 is a wasteful number, since it uses less digits than its factorization.

12781473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4695.

The product of its digits is 9408, while the sum is 33.

The square root of 12781473 is about 3575.1185994314. The cubic root of 12781473 is about 233.8085035677.

The spelling of 12781473 in words is "twelve million, seven hundred eighty-one thousand, four hundred seventy-three".