1740542491 has 4 divisors (see below), whose sum is σ = 1741100472. Its totient is φ = 1739984512.

The previous prime is 1740542483. The next prime is 1740542497. The reversal of 1740542491 is 1942450471.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1942450471 = 13 ⋅149419267.

It is a cyclic number.

It is not a de Polignac number, because 1740542491 - 2³ = 1740542483 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 1740542491.

It is not an unprimeable number, because it can be changed into a prime (1740542497) 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, 274285 + ... + 280558.

It is an arithmetic number, because the mean of its divisors is an integer number (435275118).

Almost surely, 2^1740542491 is an apocalyptic number.

1740542491 is a deficient number, since it is larger than the sum of its proper divisors (557981).

1740542491 is an equidigital number, since it uses as much as digits as its factorization.

1740542491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557980.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 1740542491 is about 41719.8093356142. The cubic root of 1740542491 is about 1202.8963580322.

The spelling of 1740542491 in words is "one billion, seven hundred forty million, five hundred forty-two thousand, four hundred ninety-one".