3915641 has 4 divisors (see below), whose sum is σ = 4041984. Its totient is φ = 3789300.

The previous prime is 3915631. The next prime is 3915683. The reversal of 3915641 is 1465193.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3915641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3915601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63125 + ... + 63186.

It is an arithmetic number, because the mean of its divisors is an integer number (1010496).

Almost surely, 2^3915641 is an apocalyptic number.

3915641 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3915641 is a deficient number, since it is larger than the sum of its proper divisors (126343).

3915641 is a wasteful number, since it uses less digits than its factorization.

3915641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126342.

The product of its digits is 3240, while the sum is 29.

The square root of 3915641 is about 1978.7978673932. The cubic root of 3915641 is about 157.6162373652.

The spelling of 3915641 in words is "three million, nine hundred fifteen thousand, six hundred forty-one".