1940861 has 4 divisors (see below), whose sum is σ = 2090172. Its totient is φ = 1791552.

The previous prime is 1940849. The next prime is 1940881. The reversal of 1940861 is 1680491.

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 902500 + 1038361 = 950^2 + 1019^2 .

It is a cyclic number.

It is not a de Polignac number, because 1940861 - 2⁶ = 1940797 is a prime.

It is a super-3 number, since 3×1940861³ = 21933329081779492143, which contains 333 as substring.

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 (1940821) 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, 74636 + ... + 74661.

It is an arithmetic number, because the mean of its divisors is an integer number (522543).

2^1940861 is an apocalyptic number.

It is an amenable number.

1940861 is a deficient number, since it is larger than the sum of its proper divisors (149311).

1940861 is a wasteful number, since it uses less digits than its factorization.

1940861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149310.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1940861 is about 1393.1478744197. The cubic root of 1940861 is about 124.7378184712.

The spelling of 1940861 in words is "one million, nine hundred forty thousand, eight hundred sixty-one".