2102145 has 8 divisors (see below), whose sum is σ = 3363456. Its totient is φ = 1121136.

The previous prime is 2102143. The next prime is 2102167. The reversal of 2102145 is 5412012.

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

It is not a de Polignac number, because 2102145 - 2¹ = 2102143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 140143 = 2102145 / (2 + 1 + 0 + 2 + 1 + 4 + 5).

2102145 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2102143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70057 + ... + 70086.

It is an arithmetic number, because the mean of its divisors is an integer number (420432).

2^2102145 is an apocalyptic number.

It is an amenable number.

2102145 is a deficient number, since it is larger than the sum of its proper divisors (1261311).

2102145 is a wasteful number, since it uses less digits than its factorization.

2102145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140151.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 2102145 is about 1449.8775810392. The cubic root of 2102145 is about 128.1015023337.

Adding to 2102145 its reverse (5412012), we get a palindrome (7514157).

The spelling of 2102145 in words is "two million, one hundred two thousand, one hundred forty-five".