2001245 has 4 divisors (see below), whose sum is σ = 2401500. Its totient is φ = 1600992.

The previous prime is 2001229. The next prime is 2001247. The reversal of 2001245 is 5421002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 662596 + 1338649 = 814^2 + 1157^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001245 - 2⁴ = 2001229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200120 + ... + 200129.

It is an arithmetic number, because the mean of its divisors is an integer number (600375).

2^2001245 is an apocalyptic number.

It is an amenable number.

2001245 is a deficient number, since it is larger than the sum of its proper divisors (400255).

2001245 is an equidigital number, since it uses as much as digits as its factorization.

2001245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400254.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 2001245 is about 1414.6536678636. The cubic root of 2001245 is about 126.0182429284.

Adding to 2001245 its reverse (5421002), we get a palindrome (7422247).

The spelling of 2001245 in words is "two million, one thousand, two hundred forty-five".