1631066 has 4 divisors (see below), whose sum is σ = 2446602. Its totient is φ = 815532.

The previous prime is 1631059. The next prime is 1631101. The reversal of 1631066 is 6601361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6601361 = 13 ⋅507797.

It can be written as a sum of positive squares in only one way, i.e., 1615441 + 15625 = 1271^2 + 125^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407765 + ... + 407768.

2^1631066 is an apocalyptic number.

1631066 is a deficient number, since it is larger than the sum of its proper divisors (815536).

1631066 is an equidigital number, since it uses as much as digits as its factorization.

1631066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815535.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1631066 is about 1277.1319430662. The cubic root of 1631066 is about 117.7128419258.

The spelling of 1631066 in words is "one million, six hundred thirty-one thousand, sixty-six".