1278830 has 16 divisors (see below), whose sum is σ = 2630880. Its totient is φ = 438432.

The previous prime is 1278817. The next prime is 1278839. The reversal of 1278830 is 388721.

It is a junction number, because it is equal to n+sod(n) for n = 1278793 and 1278802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9065 + ... + 9204.

It is an arithmetic number, because the mean of its divisors is an integer number (164430).

2^1278830 is an apocalyptic number.

1278830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1278830 is an abundant number, since it is smaller than the sum of its proper divisors (1352050).

1278830 is a wasteful number, since it uses less digits than its factorization.

1278830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18283.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 1278830 is about 1130.8536598517. The cubic root of 1278830 is about 108.5436126143.

The spelling of 1278830 in words is "one million, two hundred seventy-eight thousand, eight hundred thirty".