12778951 has 8 divisors (see below), whose sum is σ = 13753584. Its totient is φ = 11829120.

The previous prime is 12778943. The next prime is 12778967. The reversal of 12778951 is 15987721.

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

It is not a de Polignac number, because 12778951 - 2³ = 12778943 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 (12778981) 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, 5125 + ... + 7198.

It is an arithmetic number, because the mean of its divisors is an integer number (1719198).

Almost surely, 2^12778951 is an apocalyptic number.

12778951 is a deficient number, since it is larger than the sum of its proper divisors (974633).

12778951 is a wasteful number, since it uses less digits than its factorization.

12778951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12401.

The product of its digits is 35280, while the sum is 40.

The square root of 12778951 is about 3574.7658664589. The cubic root of 12778951 is about 233.7931244370.

The spelling of 12778951 in words is "twelve million, seven hundred seventy-eight thousand, nine hundred fifty-one".