2001240225 has 18 divisors (see below), whose sum is σ = 3584444006. Its totient is φ = 1067328000.

The previous prime is 2001240211. The next prime is 2001240257. The reversal of 2001240225 is 5220421002.

2001240225 is a `hidden beast` number, since 200 + 1 + 240 + 225 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1272384 + 1999967841 = 1128^2 + 44721^2 .

It is not a de Polignac number, because 2001240225 - 2⁴ = 2001240209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001240198 and 2001240207.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4446976 + ... + 4447425.

Almost surely, 2^2001240225 is an apocalyptic number.

2001240225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2001240225 is a deficient number, since it is larger than the sum of its proper divisors (1583203781).

2001240225 is a wasteful number, since it uses less digits than its factorization.

2001240225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8894417 (or 8894409 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 2001240225 is about 44735.2235380578. The cubic root of 2001240225 is about 1260.1814270119.

Adding to 2001240225 its reverse (5220421002), we get a palindrome (7221661227).

The spelling of 2001240225 in words is "two billion, one million, two hundred forty thousand, two hundred twenty-five".