1266251 has 8 divisors (see below), whose sum is σ = 1486560. Its totient is φ = 1055808.

The previous prime is 1266247. The next prime is 1266259. The reversal of 1266251 is 1526621.

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 1266251 - 2² = 1266247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266259) 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, 2186 + ... + 2703.

It is an arithmetic number, because the mean of its divisors is an integer number (185820).

2^1266251 is an apocalyptic number.

1266251 is a deficient number, since it is larger than the sum of its proper divisors (220309).

1266251 is an equidigital number, since it uses as much as digits as its factorization.

1266251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4933.

The product of its digits is 720, while the sum is 23.

The square root of 1266251 is about 1125.2781878273. The cubic root of 1266251 is about 108.1865488727.

The spelling of 1266251 in words is "one million, two hundred sixty-six thousand, two hundred fifty-one".