1985266 has 4 divisors (see below), whose sum is σ = 2977902. Its totient is φ = 992632.

The previous prime is 1985257. The next prime is 1985279. The reversal of 1985266 is 6625891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6625891 = 29 ⋅228479.

It can be written as a sum of positive squares in only one way, i.e., 1879641 + 105625 = 1371^2 + 325^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496315 + ... + 496318.

2^1985266 is an apocalyptic number.

1985266 is a deficient number, since it is larger than the sum of its proper divisors (992636).

1985266 is an equidigital number, since it uses as much as digits as its factorization.

1985266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992635.

The product of its digits is 25920, while the sum is 37.

The square root of 1985266 is about 1408.9946770659. The cubic root of 1985266 is about 125.6819474820.

The spelling of 1985266 in words is "one million, nine hundred eighty-five thousand, two hundred sixty-six".