1940287 has 4 divisors (see below), whose sum is σ = 1946800. Its totient is φ = 1933776.

The previous prime is 1940269. The next prime is 1940293. The reversal of 1940287 is 7820491.

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

It is a cyclic number.

It is not a de Polignac number, because 1940287 - 2¹¹ = 1938239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940087) 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, 2787 + ... + 3412.

It is an arithmetic number, because the mean of its divisors is an integer number (486700).

2^1940287 is an apocalyptic number.

1940287 is a deficient number, since it is larger than the sum of its proper divisors (6513).

1940287 is an equidigital number, since it uses as much as digits as its factorization.

1940287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6512.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1940287 is about 1392.9418509040. The cubic root of 1940287 is about 124.7255203954.

The spelling of 1940287 in words is "one million, nine hundred forty thousand, two hundred eighty-seven".