1278966 has 32 divisors (see below), whose sum is σ = 2903040. Its totient is φ = 372384.

The previous prime is 1278911. The next prime is 1278983. The reversal of 1278966 is 6698721.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1051 + ... + 1913.

It is an arithmetic number, because the mean of its divisors is an integer number (90720).

2^1278966 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451520).

1278966 is an abundant number, since it is smaller than the sum of its proper divisors (1624074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1278966 is a wasteful number, since it uses less digits than its factorization.

1278966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900.

The product of its digits is 36288, while the sum is 39.

The square root of 1278966 is about 1130.9137898178. The cubic root of 1278966 is about 108.5474602480.

It can be divided in two parts, 127896 and 6, that multiplied together give a square (767376 = 876²).

The spelling of 1278966 in words is "one million, two hundred seventy-eight thousand, nine hundred sixty-six".