1265545 has 4 divisors (see below), whose sum is σ = 1518660. Its totient is φ = 1012432.

The previous prime is 1265527. The next prime is 1265549. The reversal of 1265545 is 5455621.

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 992016 + 273529 = 996^2 + 523^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1265545 is a prime.

1265545 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1265549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126550 + ... + 126559.

It is an arithmetic number, because the mean of its divisors is an integer number (379665).

2^1265545 is an apocalyptic number.

It is an amenable number.

1265545 is a deficient number, since it is larger than the sum of its proper divisors (253115).

1265545 is an equidigital number, since it uses as much as digits as its factorization.

1265545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253114.

The product of its digits is 6000, while the sum is 28.

The square root of 1265545 is about 1124.9644438826. The cubic root of 1265545 is about 108.1664386146.

It can be divided in two parts, 126 and 5545, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 1265545 in words is "one million, two hundred sixty-five thousand, five hundred forty-five".