1266001 has 8 divisors (see below), whose sum is σ = 1401408. Its totient is φ = 1134000.

The previous prime is 1265993. The next prime is 1266019. The reversal of 1266001 is 1006621.

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 1266001 - 2³ = 1265993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266091) 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, 30 + ... + 1591.

It is an arithmetic number, because the mean of its divisors is an integer number (175176).

2^1266001 is an apocalyptic number.

1266001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1266001 is a deficient number, since it is larger than the sum of its proper divisors (135407).

1266001 is a wasteful number, since it uses less digits than its factorization.

1266001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1266001 is about 1125.1670987013. The cubic root of 1266001 is about 108.1794285315.

The spelling of 1266001 in words is "one million, two hundred sixty-six thousand, one".