1264565 has 4 divisors (see below), whose sum is σ = 1517484. Its totient is φ = 1011648.

The previous prime is 1264561. The next prime is 1264573. The reversal of 1264565 is 5654621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 329476 + 935089 = 574^2 + 967^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264565 - 2² = 1264561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264561) 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, 126452 + ... + 126461.

It is an arithmetic number, because the mean of its divisors is an integer number (379371).

2^1264565 is an apocalyptic number.

It is an amenable number.

1264565 is a deficient number, since it is larger than the sum of its proper divisors (252919).

1264565 is an equidigital number, since it uses as much as digits as its factorization.

1264565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252918.

The product of its digits is 7200, while the sum is 29.

The square root of 1264565 is about 1124.5287902050. The cubic root of 1264565 is about 108.1385111253.

The spelling of 1264565 in words is "one million, two hundred sixty-four thousand, five hundred sixty-five".