1264720 has 20 divisors (see below), whose sum is σ = 2940660. Its totient is φ = 505856.

The previous prime is 1264699. The next prime is 1264733. The reversal of 1264720 is 274621.

It can be written as a sum of positive squares in 2 ways, for example, as 207936 + 1056784 = 456^2 + 1028^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 1264691 and 1264700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7825 + ... + 7984.

It is an arithmetic number, because the mean of its divisors is an integer number (147033).

2^1264720 is an apocalyptic number.

1264720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264720 is an abundant number, since it is smaller than the sum of its proper divisors (1675940).

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

1264720 is a wasteful number, since it uses less digits than its factorization.

1264720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15822 (or 15816 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 1264720 is about 1124.5977058486. The cubic root of 1264720 is about 108.1429291885.

Subtracting from 1264720 its reverse (274621), we obtain a palindrome (990099).

The spelling of 1264720 in words is "one million, two hundred sixty-four thousand, seven hundred twenty".