2155075 has 24 divisors (see below), whose sum is σ = 3038000. Its totient is φ = 1503360.

The previous prime is 2155067. The next prime is 2155079. The reversal of 2155075 is 5705512.

It is a happy number.

It is not a de Polignac number, because 2155075 - 2³ = 2155067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

2155075 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2155079) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6001 + ... + 6349.

2^2155075 is an apocalyptic number.

2155075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2155075 is a deficient number, since it is larger than the sum of its proper divisors (882925).

2155075 is a wasteful number, since it uses less digits than its factorization.

2155075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 386 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 2155075 is about 1468.0173704694. The cubic root of 2155075 is about 129.1677604255.

It can be divided in two parts, 215507 and 5, that added together give a palindrome (215512).

The spelling of 2155075 in words is "two million, one hundred fifty-five thousand, seventy-five".