1948805 has 4 divisors (see below), whose sum is σ = 2338572. Its totient is φ = 1559040.

The previous prime is 1948801. The next prime is 1948847. The reversal of 1948805 is 5088491.

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

It can be written as a sum of positive squares in 2 ways, for example, as 863041 + 1085764 = 929^2 + 1042^2 .

It is not a de Polignac number, because 1948805 - 2² = 1948801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1948801) 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, 194876 + ... + 194885.

It is an arithmetic number, because the mean of its divisors is an integer number (584643).

2^1948805 is an apocalyptic number.

It is an amenable number.

1948805 is a deficient number, since it is larger than the sum of its proper divisors (389767).

1948805 is an equidigital number, since it uses as much as digits as its factorization.

1948805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389766.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 1948805 is about 1395.9960601664. The cubic root of 1948805 is about 124.9077719687.

The spelling of 1948805 in words is "one million, nine hundred forty-eight thousand, eight hundred five".