1740491 has 4 divisors (see below), whose sum is σ = 1782984. Its totient is φ = 1698000.

The previous prime is 1740481. The next prime is 1740499. The reversal of 1740491 is 1940471.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1740491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1740491.

It is not an unprimeable number, because it can be changed into a prime (1740499) 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, 21185 + ... + 21266.

It is an arithmetic number, because the mean of its divisors is an integer number (445746).

2^1740491 is an apocalyptic number.

1740491 is a deficient number, since it is larger than the sum of its proper divisors (42493).

1740491 is an equidigital number, since it uses as much as digits as its factorization.

1740491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42492.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1740491 is about 1319.2766957693. The cubic root of 1740491 is about 120.2884496032.

The spelling of 1740491 in words is "one million, seven hundred forty thousand, four hundred ninety-one".