1278460 has 24 divisors (see below), whose sum is σ = 2716560. Its totient is φ = 505344.

The previous prime is 1278439. The next prime is 1278463. The reversal of 1278460 is 648721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278463) 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, 1611 + ... + 2269.

It is an arithmetic number, because the mean of its divisors is an integer number (113190).

2^1278460 is an apocalyptic number.

1278460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1278460 is an abundant number, since it is smaller than the sum of its proper divisors (1438100).

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

1278460 is a wasteful number, since it uses less digits than its factorization.

1278460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 763 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1278460 is about 1130.6900547896. The cubic root of 1278460 is about 108.5331434066.

The spelling of 1278460 in words is "one million, two hundred seventy-eight thousand, four hundred sixty".