1266155 has 8 divisors (see below), whose sum is σ = 1657584. Its totient is φ = 920800.

The previous prime is 1266149. The next prime is 1266157. The reversal of 1266155 is 5516621.

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

It is not a de Polignac number, because 1266155 - 2⁶ = 1266091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11456 + ... + 11565.

It is an arithmetic number, because the mean of its divisors is an integer number (207198).

2^1266155 is an apocalyptic number.

1266155 is a deficient number, since it is larger than the sum of its proper divisors (391429).

1266155 is a wasteful number, since it uses less digits than its factorization.

1266155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23037.

The product of its digits is 1800, while the sum is 26.

The square root of 1266155 is about 1125.2355309001. The cubic root of 1266155 is about 108.1838147725.

The spelling of 1266155 in words is "one million, two hundred sixty-six thousand, one hundred fifty-five".