1375855 has 16 divisors (see below), whose sum is σ = 1812384. Its totient is φ = 996480.

The previous prime is 1375853. The next prime is 1375877. The reversal of 1375855 is 5585731.

It is not a de Polignac number, because 1375855 - 2¹ = 1375853 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 1375855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3792 + ... + 4138.

It is an arithmetic number, because the mean of its divisors is an integer number (113274).

2^1375855 is an apocalyptic number.

1375855 is a deficient number, since it is larger than the sum of its proper divisors (436529).

1375855 is a wasteful number, since it uses less digits than its factorization.

1375855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426.

The product of its digits is 21000, while the sum is 34.

The square root of 1375855 is about 1172.9684565239. The cubic root of 1375855 is about 111.2220482737. Note that the first 3 decimals are identical.

The spelling of 1375855 in words is "one million, three hundred seventy-five thousand, eight hundred fifty-five".