12771147 has 16 divisors (see below), whose sum is σ = 17395488. Its totient is φ = 8332800.

The previous prime is 12771139. The next prime is 12771149. The reversal of 12771147 is 74117721.

It is not a de Polignac number, because 12771147 - 2³ = 12771139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12771149) 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, 34053 + ... + 34425.

It is an arithmetic number, because the mean of its divisors is an integer number (1087218).

Almost surely, 2^12771147 is an apocalyptic number.

12771147 is a deficient number, since it is larger than the sum of its proper divisors (4624341).

12771147 is a wasteful number, since it uses less digits than its factorization.

12771147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590.

The product of its digits is 2744, while the sum is 30.

The square root of 12771147 is about 3573.6741597409. The cubic root of 12771147 is about 233.7455229013.

Adding to 12771147 its reverse (74117721), we get a palindrome (86888868).

It can be divided in two parts, 12 and 771147, that multiplied together give a square (9253764 = 3042²).

The spelling of 12771147 in words is "twelve million, seven hundred seventy-one thousand, one hundred forty-seven".