2100501 has 18 divisors (see below), whose sum is σ = 3287778. Its totient is φ = 1291680.

The previous prime is 2100493. The next prime is 2100523. The reversal of 2100501 is 1050012.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 900 + 2099601 = 30^2 + 1449^2 .

It is not a de Polignac number, because 2100501 - 2³ = 2100493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 831 + ... + 2211.

2^2100501 is an apocalyptic number.

It is an amenable number.

2100501 is a deficient number, since it is larger than the sum of its proper divisors (1187277).

2100501 is a wasteful number, since it uses less digits than its factorization.

2100501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413 (or 1397 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 2100501 is about 1449.3105257328. The cubic root of 2100501 is about 128.0680993424.

Adding to 2100501 its reverse (1050012), we get a palindrome (3150513).

It can be divided in two parts, 2100 and 501, that added together give a square (2601 = 51²).

The spelling of 2100501 in words is "two million, one hundred thousand, five hundred one".