1266121 has 4 divisors (see below), whose sum is σ = 1297044. Its totient is φ = 1235200.

The previous prime is 1266113. The next prime is 1266149. The reversal of 1266121 is 1216621.

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 657721 + 608400 = 811^2 + 780^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266121 - 2³ = 1266113 is a prime.

It is a Duffinian number.

1266121 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1266101) 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, 15400 + ... + 15481.

It is an arithmetic number, because the mean of its divisors is an integer number (324261).

2^1266121 is an apocalyptic number.

It is an amenable number.

1266121 is a deficient number, since it is larger than the sum of its proper divisors (30923).

1266121 is an equidigital number, since it uses as much as digits as its factorization.

1266121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30922.

The product of its digits is 144, while the sum is 19.

The square root of 1266121 is about 1125.2204228506. The cubic root of 1266121 is about 108.1828464122.

The spelling of 1266121 in words is "one million, two hundred sixty-six thousand, one hundred twenty-one".