1266945 has 8 divisors (see below), whose sum is σ = 2027136. Its totient is φ = 675696.

The previous prime is 1266943. The next prime is 1266949. The reversal of 1266945 is 5496621.

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

It is not a de Polignac number, because 1266945 - 2¹ = 1266943 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1266943) 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, 42217 + ... + 42246.

It is an arithmetic number, because the mean of its divisors is an integer number (253392).

2^1266945 is an apocalyptic number.

1266945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1266945 is a deficient number, since it is larger than the sum of its proper divisors (760191).

1266945 is an equidigital number, since it uses as much as digits as its factorization.

1266945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84471.

The product of its digits is 12960, while the sum is 33.

The square root of 1266945 is about 1125.5865137785. The cubic root of 1266945 is about 108.2063100291.

It can be divided in two parts, 1266 and 945, that added together give a triangular number (2211 = T₆₆).

The spelling of 1266945 in words is "one million, two hundred sixty-six thousand, nine hundred forty-five".