1266745 has 4 divisors (see below), whose sum is σ = 1520100. Its totient is φ = 1013392.

The previous prime is 1266743. The next prime is 1266751. The reversal of 1266745 is 5476621.

It is a happy number.

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 670761 + 595984 = 819^2 + 772^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266745 - 2¹ = 1266743 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

1266745 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1266743) 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, 126670 + ... + 126679.

It is an arithmetic number, because the mean of its divisors is an integer number (380025).

2^1266745 is an apocalyptic number.

It is an amenable number.

1266745 is a deficient number, since it is larger than the sum of its proper divisors (253355).

1266745 is an equidigital number, since it uses as much as digits as its factorization.

1266745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253354.

The product of its digits is 10080, while the sum is 31.

The square root of 1266745 is about 1125.4976677008. The cubic root of 1266745 is about 108.2006159117.

The spelling of 1266745 in words is "one million, two hundred sixty-six thousand, seven hundred forty-five".