1266545 has 8 divisors (see below), whose sum is σ = 1737024. Its totient is φ = 868464.

The previous prime is 1266539. The next prime is 1266557. The reversal of 1266545 is 5456621.

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 1266545 - 2¹⁰ = 1265521 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18059 + ... + 18128.

It is an arithmetic number, because the mean of its divisors is an integer number (217128).

2^1266545 is an apocalyptic number.

It is an amenable number.

1266545 is a deficient number, since it is larger than the sum of its proper divisors (470479).

1266545 is an equidigital number, since it uses as much as digits as its factorization.

1266545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36199.

The product of its digits is 7200, while the sum is 29.

The square root of 1266545 is about 1125.4088146092. The cubic root of 1266545 is about 108.1949211948.

The spelling of 1266545 in words is "one million, two hundred sixty-six thousand, five hundred forty-five".