1264816 has 40 divisors (see below), whose sum is σ = 2928384. Its totient is φ = 517440.

The previous prime is 1264807. The next prime is 1264819. The reversal of 1264816 is 6184621.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264819) 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, 2331 + ... + 2821.

2^1264816 is an apocalyptic number.

1264816 is a gapful number since it is divisible by the number (16) 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 1264816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1464192).

1264816 is an abundant number, since it is smaller than the sum of its proper divisors (1663568).

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

1264816 is a wasteful number, since it uses less digits than its factorization.

1264816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 523 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 1264816 is about 1124.6403869682. The cubic root of 1264816 is about 108.1456653563.

It can be divided in two parts, 1264 and 816, that added together give a triangular number (2080 = T₆₄).

The spelling of 1264816 in words is "one million, two hundred sixty-four thousand, eight hundred sixteen".