1940491 has 4 divisors (see below), whose sum is σ = 2217712. Its totient is φ = 1663272.

The previous prime is 1940483. The next prime is 1940509.

1940491 is nontrivially palindromic in base 10.

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 1940491 - 2³ = 1940483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1940401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138600 + ... + 138613.

It is an arithmetic number, because the mean of its divisors is an integer number (554428).

2^1940491 is an apocalyptic number.

1940491 is a deficient number, since it is larger than the sum of its proper divisors (277221).

1940491 is an equidigital number, since it uses as much as digits as its factorization.

1940491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277220.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1940491 is about 1393.0150752953. The cubic root of 1940491 is about 124.7298914179.

The spelling of 1940491 in words is "one million, nine hundred forty thousand, four hundred ninety-one".