4015641 has 16 divisors (see below), whose sum is σ = 6262784. Its totient is φ = 2240784.

The previous prime is 4015637. The next prime is 4015643. The reversal of 4015641 is 1465104.

4015641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4015641 - 2² = 4015637 is a prime.

It is a super-2 number, since 2×4015641² = 32250745281762, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4015643) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1321 + ... + 3126.

It is an arithmetic number, because the mean of its divisors is an integer number (391424).

Almost surely, 2^4015641 is an apocalyptic number.

It is an amenable number.

4015641 is a deficient number, since it is larger than the sum of its proper divisors (2247143).

4015641 is a wasteful number, since it uses less digits than its factorization.

4015641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4500.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 4015641 is about 2003.9064349415. The cubic root of 4015641 is about 158.9467405972.

It can be divided in two parts, 4015 and 641, that added together give a triangular number (4656 = T₉₆).

The spelling of 4015641 in words is "four million, fifteen thousand, six hundred forty-one".