1266601 has 6 divisors (see below), whose sum is σ = 1473450. Its totient is φ = 1085616.

The previous prime is 1266593. The next prime is 1266611. The reversal of 1266601 is 1066621.

It can be written as a sum of positive squares in only one way, i.e., 705600 + 561001 = 840^2 + 749^2 .

It is not a de Polignac number, because 1266601 - 2³ = 1266593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266611) 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 5 ways as a sum of consecutive naturals, for example, 12876 + ... + 12973.

It is an arithmetic number, because the mean of its divisors is an integer number (245575).

2^1266601 is an apocalyptic number.

It is an amenable number.

1266601 is a deficient number, since it is larger than the sum of its proper divisors (206849).

1266601 is an equidigital number, since it uses as much as digits as its factorization.

1266601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25863 (or 25856 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1266601 is about 1125.4336941819. The cubic root of 1266601 is about 108.1965157760.

The spelling of 1266601 in words is "one million, two hundred sixty-six thousand, six hundred one".