1966522 has 4 divisors (see below), whose sum is σ = 2949786. Its totient is φ = 983260.

The previous prime is 1966511. The next prime is 1966561. The reversal of 1966522 is 2256691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1962801 + 3721 = 1401^2 + 61^2 .

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 an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491629 + ... + 491632.

2^1966522 is an apocalyptic number.

1966522 is a deficient number, since it is larger than the sum of its proper divisors (983264).

1966522 is an equidigital number, since it uses as much as digits as its factorization.

1966522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983263.

The product of its digits is 6480, while the sum is 31.

The square root of 1966522 is about 1402.3273512272. The cubic root of 1966522 is about 125.2851516802.

The spelling of 1966522 in words is "one million, nine hundred sixty-six thousand, five hundred twenty-two".