1266273 has 18 divisors (see below), whose sum is σ = 1909154. Its totient is φ = 839808.

The previous prime is 1266271. The next prime is 1266277. The reversal of 1266273 is 3726621.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 944784 + 321489 = 972^2 + 567^2 .

It is not a de Polignac number, because 1266273 - 2¹ = 1266271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266271) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6465 + ... + 6657.

2^1266273 is an apocalyptic number.

It is an amenable number.

1266273 is a deficient number, since it is larger than the sum of its proper divisors (642881).

1266273 is an frugal number, since it uses more digits than its factorization.

1266273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 196 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 1266273 is about 1125.2879631454. The cubic root of 1266273 is about 108.1871754178.

The spelling of 1266273 in words is "one million, two hundred sixty-six thousand, two hundred seventy-three".