1985263 has 4 divisors (see below), whose sum is σ = 2268880. Its totient is φ = 1701648.

The previous prime is 1985257. The next prime is 1985279. The reversal of 1985263 is 3625891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3625891 = 193 ⋅18787.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1985263 is a prime.

It is a super-3 number, since 3×1985263³ = 23473367623333759341, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141798 + ... + 141811.

It is an arithmetic number, because the mean of its divisors is an integer number (567220).

2^1985263 is an apocalyptic number.

1985263 is a deficient number, since it is larger than the sum of its proper divisors (283617).

1985263 is an equidigital number, since it uses as much as digits as its factorization.

1985263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283616.

The product of its digits is 12960, while the sum is 34.

The square root of 1985263 is about 1408.9936124766. The cubic root of 1985263 is about 125.6818841746.

The spelling of 1985263 in words is "one million, nine hundred eighty-five thousand, two hundred sixty-three".