1262665 has 4 divisors (see below), whose sum is σ = 1515204. Its totient is φ = 1010128.

The previous prime is 1262633. The next prime is 1262669. The reversal of 1262665 is 5662621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5662621 = 137 ⋅41333.

It can be written as a sum of positive squares in 2 ways, for example, as 962361 + 300304 = 981^2 + 548^2 .

It is a cyclic number.

It is not a de Polignac number, because 1262665 - 2⁵ = 1262633 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1262669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126262 + ... + 126271.

It is an arithmetic number, because the mean of its divisors is an integer number (378801).

2^1262665 is an apocalyptic number.

It is an amenable number.

1262665 is a deficient number, since it is larger than the sum of its proper divisors (252539).

1262665 is an equidigital number, since it uses as much as digits as its factorization.

1262665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252538.

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

The square root of 1262665 is about 1123.6836743497. The cubic root of 1262665 is about 108.0843248611.

It can be divided in two parts, 126 and 2665, that multiplied together give a triangular number (335790 = T₈₁₉).

The spelling of 1262665 in words is "one million, two hundred sixty-two thousand, six hundred sixty-five".