1264820 has 12 divisors (see below), whose sum is σ = 2656164. Its totient is φ = 505920.

The previous prime is 1264819. The next prime is 1264829. The reversal of 1264820 is 284621.

It can be written as a sum of positive squares in 2 ways, for example, as 414736 + 850084 = 644^2 + 922^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31601 + ... + 31640.

It is an arithmetic number, because the mean of its divisors is an integer number (221347).

2^1264820 is an apocalyptic number.

1264820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264820 is an abundant number, since it is smaller than the sum of its proper divisors (1391344).

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

1264820 is a wasteful number, since it uses less digits than its factorization.

1264820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63250 (or 63248 counting only the distinct ones).

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

The square root of 1264820 is about 1124.6421653130. The cubic root of 1264820 is about 108.1457793603.

The spelling of 1264820 in words is "one million, two hundred sixty-four thousand, eight hundred twenty".