2101145 has 12 divisors (see below), whose sum is σ = 2593956. Its totient is φ = 1633440.

The previous prime is 2101139. The next prime is 2101157. The reversal of 2101145 is 5411012.

It can be written as a sum of positive squares in 2 ways, for example, as 337561 + 1763584 = 581^2 + 1328^2 .

It is not a de Polignac number, because 2101145 - 2⁴ = 2101129 is a prime.

It is a super-2 number, since 2×2101145² = 8829620622050, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25274 + ... + 25356.

It is an arithmetic number, because the mean of its divisors is an integer number (216163).

2^2101145 is an apocalyptic number.

It is an amenable number.

2101145 is a deficient number, since it is larger than the sum of its proper divisors (492811).

2101145 is an frugal number, since it uses more digits than its factorization.

2101145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 2101145 is about 1449.5326833156. The cubic root of 2101145 is about 128.0811862882.

Adding to 2101145 its reverse (5411012), we get a palindrome (7512157).

The spelling of 2101145 in words is "two million, one hundred one thousand, one hundred forty-five".