1266205 has 8 divisors (see below), whose sum is σ = 1530072. Its totient is φ = 1005888.

The previous prime is 1266197. The next prime is 1266229. The reversal of 1266205 is 5026621.

It can be written as a sum of positive squares in 4 ways, for example, as 95481 + 1170724 = 309^2 + 1082^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1266205 - 2³ = 1266197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22 + ... + 1591.

It is an arithmetic number, because the mean of its divisors is an integer number (191259).

2^1266205 is an apocalyptic number.

It is an amenable number.

1266205 is a deficient number, since it is larger than the sum of its proper divisors (263867).

1266205 is a wasteful number, since it uses less digits than its factorization.

1266205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1266205 is about 1125.2577482515. The cubic root of 1266205 is about 108.1852388002.

The spelling of 1266205 in words is "one million, two hundred sixty-six thousand, two hundred five".