1740649 has 2 divisors, whose sum is σ = 1740650. Its totient is φ = 1740648.

The previous prime is 1740631. The next prime is 1740689. The reversal of 1740649 is 9460471.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1708249 + 32400 = 1307^2 + 180^2 .

It is an emirp because it is prime and its reverse (9460471) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1740649 - 2⁷ = 1740521 is a prime.

1740649 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1740649.

It is not a weakly prime, because it can be changed into another prime (1740689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 870324 + 870325.

It is an arithmetic number, because the mean of its divisors is an integer number (870325).

2^1740649 is an apocalyptic number.

It is an amenable number.

1740649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1740649 is an equidigital number, since it uses as much as digits as its factorization.

1740649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1740649 is about 1319.3365757077. The cubic root of 1740649 is about 120.2920893807.

The spelling of 1740649 in words is "one million, seven hundred forty thousand, six hundred forty-nine".