1246820 has 24 divisors (see below), whose sum is σ = 2704128. Its totient is φ = 482400.

The previous prime is 1246781. The next prime is 1246823. The reversal of 1246820 is 286421.

It is a super-2 number, since 2×1246820² = 3109120224800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1246823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386 + ... + 1625.

It is an arithmetic number, because the mean of its divisors is an integer number (112672).

2^1246820 is an apocalyptic number.

1246820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1246820 is an abundant number, since it is smaller than the sum of its proper divisors (1457308).

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

1246820 is a wasteful number, since it uses less digits than its factorization.

1246820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051 (or 2049 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1246820 is about 1116.6109438833. The cubic root of 1246820 is about 107.6303088979.

The spelling of 1246820 in words is "one million, two hundred forty-six thousand, eight hundred twenty".