1264865 has 16 divisors (see below), whose sum is σ = 1762560. Its totient is φ = 853440.

The previous prime is 1264859. The next prime is 1264867. The reversal of 1264865 is 5684621.

It is not a de Polignac number, because 1264865 - 2⁶ = 1264801 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2231 + ... + 2739.

It is an arithmetic number, because the mean of its divisors is an integer number (110160).

2^1264865 is an apocalyptic number.

It is an amenable number.

1264865 is a deficient number, since it is larger than the sum of its proper divisors (497695).

1264865 is an equidigital number, since it uses as much as digits as its factorization.

1264865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592.

The product of its digits is 11520, while the sum is 32.

The square root of 1264865 is about 1124.6621714986. The cubic root of 1264865 is about 108.1470618886.

The spelling of 1264865 in words is "one million, two hundred sixty-four thousand, eight hundred sixty-five".