12779143 has 8 divisors (see below), whose sum is σ = 13840736. Its totient is φ = 11728800.

The previous prime is 12779141. The next prime is 12779147. The reversal of 12779143 is 34197721.

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

It is not a de Polignac number, because 12779143 - 2¹ = 12779141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12779099 and 12779108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12779141) 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, 363 + ... + 5068.

It is an arithmetic number, because the mean of its divisors is an integer number (1730092).

Almost surely, 2^12779143 is an apocalyptic number.

12779143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12779143 is a deficient number, since it is larger than the sum of its proper divisors (1061593).

12779143 is a wasteful number, since it uses less digits than its factorization.

12779143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5625.

The product of its digits is 10584, while the sum is 34.

The square root of 12779143 is about 3574.7927212637. The cubic root of 12779143 is about 233.7942953222.

The spelling of 12779143 in words is "twelve million, seven hundred seventy-nine thousand, one hundred forty-three".