1266613 has 4 divisors (see below), whose sum is σ = 1297548. Its totient is φ = 1235680.

The previous prime is 1266611. The next prime is 1266631. The reversal of 1266613 is 3166621.

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 232324 + 1034289 = 482^2 + 1017^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266613 - 2¹ = 1266611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266611) 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, 15406 + ... + 15487.

It is an arithmetic number, because the mean of its divisors is an integer number (324387).

2^1266613 is an apocalyptic number.

It is an amenable number.

1266613 is a deficient number, since it is larger than the sum of its proper divisors (30935).

1266613 is an equidigital number, since it uses as much as digits as its factorization.

1266613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30934.

The product of its digits is 1296, while the sum is 25.

The square root of 1266613 is about 1125.4390254474. The cubic root of 1266613 is about 108.1968574658.

The spelling of 1266613 in words is "one million, two hundred sixty-six thousand, six hundred thirteen".