4001641225 has 12 divisors (see below), whose sum is σ = 4979577616. Its totient is φ = 3189995280.

The previous prime is 4001641207. The next prime is 4001641249. The reversal of 4001641225 is 5221461004.

It is a happy number.

It is not a de Polignac number, because 4001641225 - 2⁷ = 4001641097 is a prime.

It is a super-3 number, since 3×4001641225³ (a number of 30 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4001641225.

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, 275727 + ... + 289876.

Almost surely, 2^4001641225 is an apocalyptic number.

It is an amenable number.

4001641225 is a deficient number, since it is larger than the sum of its proper divisors (977936391).

4001641225 is a wasteful number, since it uses less digits than its factorization.

4001641225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565896 (or 565891 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 4001641225 is about 63258.5268955893. The cubic root of 4001641225 is about 1587.6181291392.

The spelling of 4001641225 in words is "four billion, one million, six hundred forty-one thousand, two hundred twenty-five".