2100545 has 8 divisors (see below), whose sum is σ = 2653440. Its totient is φ = 1591920.

The previous prime is 2100541. The next prime is 2100551. The reversal of 2100545 is 5450012.

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

It is not a de Polignac number, because 2100545 - 2² = 2100541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2100541) 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, 10961 + ... + 11150.

It is an arithmetic number, because the mean of its divisors is an integer number (331680).

2^2100545 is an apocalyptic number.

It is an amenable number.

2100545 is a deficient number, since it is larger than the sum of its proper divisors (552895).

2100545 is a wasteful number, since it uses less digits than its factorization.

2100545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22135.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 2100545 is about 1449.3257052850. The cubic root of 2100545 is about 128.0689935667.

Adding to 2100545 its reverse (5450012), we get a palindrome (7550557).

The spelling of 2100545 in words is "two million, one hundred thousand, five hundred forty-five".