2171025 has 18 divisors (see below), whose sum is σ = 3888950. Its totient is φ = 1157760.

The previous prime is 2171021. The next prime is 2171077. The reversal of 2171025 is 5201712.

It can be written as a sum of positive squares in 3 ways, for example, as 1296 + 2169729 = 36^2 + 1473^2 .

It is not a de Polignac number, because 2171025 - 2² = 2171021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2170989 and 2171007.

It is not an unprimeable number, because it can be changed into a prime (2171021) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4600 + ... + 5049.

2^2171025 is an apocalyptic number.

2171025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2171025 is a deficient number, since it is larger than the sum of its proper divisors (1717925).

2171025 is a wasteful number, since it uses less digits than its factorization.

2171025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9665 (or 9657 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 2171025 is about 1473.4398528613. The cubic root of 2171025 is about 129.4856401443.

Adding to 2171025 its reverse (5201712), we get a palindrome (7372737).

The spelling of 2171025 in words is "two million, one hundred seventy-one thousand, twenty-five".