1278126 has 16 divisors (see below), whose sum is σ = 2840400. Its totient is φ = 426024.

The previous prime is 1278113. The next prime is 1278131. The reversal of 1278126 is 6218721.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1278126.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11781 + ... + 11888.

It is an arithmetic number, because the mean of its divisors is an integer number (177525).

2^1278126 is an apocalyptic number.

1278126 is an abundant number, since it is smaller than the sum of its proper divisors (1562274).

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

1278126 is a wasteful number, since it uses less digits than its factorization.

1278126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23680 (or 23674 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 1278126 is about 1130.5423477252. The cubic root of 1278126 is about 108.5236910898.

It can be divided in two parts, 1278 and 126, that multiplied together give a triangular number (161028 = T₅₆₇).

The spelling of 1278126 in words is "one million, two hundred seventy-eight thousand, one hundred twenty-six".