2155125 has 32 divisors (see below), whose sum is σ = 4103424. Its totient is φ = 984000.

The previous prime is 2155121. The next prime is 2155129. The reversal of 2155125 is 5215512.

It is an interprime number because it is at equal distance from previous prime (2155121) and next prime (2155129).

It is not a de Polignac number, because 2155125 - 2² = 2155121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2215 + ... + 3035.

It is an arithmetic number, because the mean of its divisors is an integer number (128232).

2^2155125 is an apocalyptic number.

2155125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2155125 is a deficient number, since it is larger than the sum of its proper divisors (1948299).

2155125 is an equidigital number, since it uses as much as digits as its factorization.

2155125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846 (or 836 counting only the distinct ones).

The product of its digits is 500, while the sum is 21.

The square root of 2155125 is about 1468.0344001419. The cubic root of 2155125 is about 129.1687593602.

It can be divided in two parts, 21 and 55125, that multiplied together give a cube (1157625 = 105³).

The spelling of 2155125 in words is "two million, one hundred fifty-five thousand, one hundred twenty-five".