4001652 has 36 divisors (see below), whose sum is σ = 10466820. Its totient is φ = 1287552.

The previous prime is 4001639. The next prime is 4001689. The reversal of 4001652 is 2561004.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1454436 + 2547216 = 1206^2 + 1596^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 873 + ... + 2960.

It is an arithmetic number, because the mean of its divisors is an integer number (290745).

Almost surely, 2^4001652 is an apocalyptic number.

It is an amenable number.

4001652 is an abundant number, since it is smaller than the sum of its proper divisors (6465168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4001652 is a wasteful number, since it uses less digits than its factorization.

4001652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3872 (or 3867 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 4001652 is about 2000.4129573666. The cubic root of 4001652 is about 158.7619554102.

Adding to 4001652 its reverse (2561004), we get a palindrome (6562656).

The spelling of 4001652 in words is "four million, one thousand, six hundred fifty-two".