1540255 has 4 divisors (see below), whose sum is σ = 1848312. Its totient is φ = 1232200.

The previous prime is 1540249. The next prime is 1540289. The reversal of 1540255 is 5520451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5520451 = 107 ⋅51593.

It is not a de Polignac number, because 1540255 - 2⁵ = 1540223 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

1540255 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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, 154021 + ... + 154030.

It is an arithmetic number, because the mean of its divisors is an integer number (462078).

2^1540255 is an apocalyptic number.

1540255 is a deficient number, since it is larger than the sum of its proper divisors (308057).

1540255 is an equidigital number, since it uses as much as digits as its factorization.

1540255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308056.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 1540255 is about 1241.0701027742. The cubic root of 1540255 is about 115.4864085754.

The spelling of 1540255 in words is "one million, five hundred forty thousand, two hundred fifty-five".