1265626 has 4 divisors (see below), whose sum is σ = 1898442. Its totient is φ = 632812.

The previous prime is 1265623. The next prime is 1265639. The reversal of 1265626 is 6265621.

It is a Cunningham number, because it is equal to 1125²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6265621 = 1559 ⋅4019.

It can be written as a sum of positive squares in only one way, i.e., 1265625 + 1 = 1125^2 + 1^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1265594 and 1265603.

It is not an unprimeable number, because it can be changed into a prime (1265623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316405 + ... + 316408.

2^1265626 is an apocalyptic number.

1265626 is a deficient number, since it is larger than the sum of its proper divisors (632816).

1265626 is an equidigital number, since it uses as much as digits as its factorization.

1265626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632815.

The product of its digits is 4320, while the sum is 28.

The square root of 1265626 is about 1125.0004444444. Note that the first 3 decimals coincide. The cubic root of 1265626 is about 108.1687462619.

It can be divided in two parts, 1265 and 626, that added together give a triangular number (1891 = T₆₁).

The spelling of 1265626 in words is "one million, two hundred sixty-five thousand, six hundred twenty-six".