1540855 has 8 divisors (see below), whose sum is σ = 1908864. Its totient is φ = 1192800.

The previous prime is 1540849. The next prime is 1540859. The reversal of 1540855 is 5580451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1540855 - 2⁵ = 1540823 is a prime.

It is a Duffinian number.

1540855 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4816 + ... + 5125.

It is an arithmetic number, because the mean of its divisors is an integer number (238608).

2^1540855 is an apocalyptic number.

1540855 is a deficient number, since it is larger than the sum of its proper divisors (368009).

1540855 is an equidigital number, since it uses as much as digits as its factorization.

1540855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9977.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 1540855 is about 1241.3118061148. The cubic root of 1540855 is about 115.5014023805.

The spelling of 1540855 in words is "one million, five hundred forty thousand, eight hundred fifty-five".