1265859 has 24 divisors (see below), whose sum is σ = 2126592. Its totient is φ = 710640.

The previous prime is 1265857. The next prime is 1265861. The reversal of 1265859 is 9585621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1265857) and next prime (1265861).

It is not a de Polignac number, because 1265859 - 2¹ = 1265857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4332 + ... + 4614.

It is an arithmetic number, because the mean of its divisors is an integer number (88608).

2^1265859 is an apocalyptic number.

1265859 is a deficient number, since it is larger than the sum of its proper divisors (860733).

1265859 is a wasteful number, since it uses less digits than its factorization.

1265859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367 (or 364 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 1265859 is about 1125.1039951933. The cubic root of 1265859 is about 108.1753837603.

The spelling of 1265859 in words is "one million, two hundred sixty-five thousand, eight hundred fifty-nine".