1540849 has 2 divisors, whose sum is σ = 1540850. Its totient is φ = 1540848.

The previous prime is 1540841. The next prime is 1540859. The reversal of 1540849 is 9480451.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1537600 + 3249 = 1240^2 + 57^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540849 - 2³ = 1540841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1540849.

It is not a weakly prime, because it can be changed into another prime (1540841) 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 as a sum of consecutive naturals, namely, 770424 + 770425.

It is an arithmetic number, because the mean of its divisors is an integer number (770425).

2^1540849 is an apocalyptic number.

It is an amenable number.

1540849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540849 is an equidigital number, since it uses as much as digits as its factorization.

1540849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1540849 is about 1241.3093893144. The cubic root of 1540849 is about 115.5012524617.

The spelling of 1540849 in words is "one million, five hundred forty thousand, eight hundred forty-nine".