3961520 has 40 divisors (see below), whose sum is σ = 9615456. Its totient is φ = 1515008.

The previous prime is 3961513. The next prime is 3961537. The reversal of 3961520 is 251693.

3961520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 3961520.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764 + ... + 2916.

Almost surely, 2^3961520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3961520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4807728).

3961520 is an abundant number, since it is smaller than the sum of its proper divisors (5653936).

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

3961520 is a wasteful number, since it uses less digits than its factorization.

3961520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189 (or 2183 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 3961520 is about 1990.3567519417. The cubic root of 3961520 is about 158.2294375342.

The spelling of 3961520 in words is "three million, nine hundred sixty-one thousand, five hundred twenty".