1264320 has 84 divisors (see below), whose sum is σ = 4358640. Its totient is φ = 336384.

The previous prime is 1264303. The next prime is 1264331. The reversal of 1264320 is 234621.

It is a happy number.

1264320 is a `hidden beast` number, since 1 + 2 + 643 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1264293 and 1264302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2661 + ... + 3099.

2^1264320 is an apocalyptic number.

1264320 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 1264320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2179320).

1264320 is an abundant number, since it is smaller than the sum of its proper divisors (3094320).

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

1264320 is a wasteful number, since it uses less digits than its factorization.

1264320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1264320 is about 1124.4198504118. The cubic root of 1264320 is about 108.1315269986.

Adding to 1264320 its reverse (234621), we get a palindrome (1498941).

The spelling of 1264320 in words is "one million, two hundred sixty-four thousand, three hundred twenty".