1349666 has 4 divisors (see below), whose sum is σ = 2024502. Its totient is φ = 674832.

The previous prime is 1349651. The next prime is 1349669. The reversal of 1349666 is 6669431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6669431 = 911 ⋅7321.

It can be written as a sum of positive squares in only one way, i.e., 1256641 + 93025 = 1121^2 + 305^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1349669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337415 + ... + 337418.

2^1349666 is an apocalyptic number.

1349666 is a deficient number, since it is larger than the sum of its proper divisors (674836).

1349666 is an equidigital number, since it uses as much as digits as its factorization.

1349666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674835.

The product of its digits is 23328, while the sum is 35.

The square root of 1349666 is about 1161.7512642558. The cubic root of 1349666 is about 110.5118296406.

The spelling of 1349666 in words is "one million, three hundred forty-nine thousand, six hundred sixty-six".