1985469 has 4 divisors (see below), whose sum is σ = 2647296. Its totient is φ = 1323644.

The previous prime is 1985453. The next prime is 1985471. The reversal of 1985469 is 9645891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9645891 = 3 ⋅3215297.

It is a cyclic number.

It is not a de Polignac number, because 1985469 - 2⁴ = 1985453 is a prime.

It is a super-2 number, since 2×1985469² = 7884174299922, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1985469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985419) 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, 330909 + ... + 330914.

It is an arithmetic number, because the mean of its divisors is an integer number (661824).

2^1985469 is an apocalyptic number.

It is an amenable number.

1985469 is a deficient number, since it is larger than the sum of its proper divisors (661827).

1985469 is an equidigital number, since it uses as much as digits as its factorization.

1985469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661826.

The product of its digits is 77760, while the sum is 42.

The square root of 1985469 is about 1409.0667124022. The cubic root of 1985469 is about 125.6862311340.

The spelling of 1985469 in words is "one million, nine hundred eighty-five thousand, four hundred sixty-nine".