1815466 has 4 divisors (see below), whose sum is σ = 2723202. Its totient is φ = 907732.

The previous prime is 1815461. The next prime is 1815467. The reversal of 1815466 is 6645181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6645181 = 17 ⋅390893.

It can be written as a sum of positive squares in only one way, i.e., 1221025 + 594441 = 1105^2 + 771^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a pancake number, because a pancake can be divided into 1815466 parts by 1905 straight cuts.

It is not an unprimeable number, because it can be changed into a prime (1815461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453865 + ... + 453868.

2^1815466 is an apocalyptic number.

1815466 is a deficient number, since it is larger than the sum of its proper divisors (907736).

1815466 is an equidigital number, since it uses as much as digits as its factorization.

1815466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907735.

The product of its digits is 5760, while the sum is 31.

The square root of 1815466 is about 1347.3922962523. The cubic root of 1815466 is about 121.9914443521.

The spelling of 1815466 in words is "one million, eight hundred fifteen thousand, four hundred sixty-six".