1262820 has 48 divisors (see below), whose sum is σ = 3810240. Its totient is φ = 310656.

The previous prime is 1262819. The next prime is 1262839. The reversal of 1262820 is 282621.

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, 30 + ... + 1589.

It is an arithmetic number, because the mean of its divisors is an integer number (79380).

2^1262820 is an apocalyptic number.

1262820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1262820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1905120).

1262820 is an abundant number, since it is smaller than the sum of its proper divisors (2547420).

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

1262820 is a wasteful number, since it uses less digits than its factorization.

1262820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644 (or 1642 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1262820 is about 1123.7526418211. The cubic root of 1262820 is about 108.0887473550.

The spelling of 1262820 in words is "one million, two hundred sixty-two thousand, eight hundred twenty".