1791266 has 4 divisors (see below), whose sum is σ = 2686902. Its totient is φ = 895632.

The previous prime is 1791247. The next prime is 1791269. The reversal of 1791266 is 6621971.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6621971 = 47 ⋅140893.

It can be written as a sum of positive squares in only one way, i.e., 1745041 + 46225 = 1321^2 + 215^2 .

It is not an unprimeable number, because it can be changed into a prime (1791269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 447815 + ... + 447818.

2^1791266 is an apocalyptic number.

1791266 is a deficient number, since it is larger than the sum of its proper divisors (895636).

1791266 is an equidigital number, since it uses as much as digits as its factorization.

1791266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895635.

The product of its digits is 4536, while the sum is 32.

The square root of 1791266 is about 1338.3818588131. The cubic root of 1791266 is about 121.4469728580.

The spelling of 1791266 in words is "one million, seven hundred ninety-one thousand, two hundred sixty-six".