1278570 has 64 divisors (see below), whose sum is σ = 3421440. Its totient is φ = 304128.

The previous prime is 1278551. The next prime is 1278583. The reversal of 1278570 is 758721.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11676 + ... + 11784.

It is an arithmetic number, because the mean of its divisors is an integer number (53460).

2^1278570 is an apocalyptic number.

1278570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1710720).

1278570 is an abundant number, since it is smaller than the sum of its proper divisors (2142870).

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

1278570 is a wasteful number, since it uses less digits than its factorization.

1278570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 1278570 is about 1130.7386966050. The cubic root of 1278570 is about 108.5362560848.

The spelling of 1278570 in words is "one million, two hundred seventy-eight thousand, five hundred seventy".