1265536 has 16 divisors (see below), whose sum is σ = 2521440. Its totient is φ = 632704.

The previous prime is 1265527. The next prime is 1265549. The reversal of 1265536 is 6355621.

1265536 is nontrivially palindromic in base 15.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4816 + ... + 5071.

It is an arithmetic number, because the mean of its divisors is an integer number (157590).

2^1265536 is an apocalyptic number.

1265536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1265536 is a deficient number, since it is larger than the sum of its proper divisors (1255904).

1265536 is an frugal number, since it uses more digits than its factorization.

1265536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9901 (or 9889 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

The square root of 1265536 is about 1124.9604437490. The cubic root of 1265536 is about 108.1661822033.

The spelling of 1265536 in words is "one million, two hundred sixty-five thousand, five hundred thirty-six".