4015581 has 8 divisors (see below), whose sum is σ = 5484864. Its totient is φ = 2611680.

The previous prime is 4015579. The next prime is 4015619. The reversal of 4015581 is 1855104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4015581 - 2¹ = 4015579 is a prime.

It is a super-2 number, since 2×4015581² = 32249781535122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4015381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16201 + ... + 16446.

It is an arithmetic number, because the mean of its divisors is an integer number (685608).

Almost surely, 2^4015581 is an apocalyptic number.

4015581 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4015581 is a deficient number, since it is larger than the sum of its proper divisors (1469283).

4015581 is a wasteful number, since it uses less digits than its factorization.

4015581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32691.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 4015581 is about 2003.8914641267. The cubic root of 4015581 is about 158.9459489550.

The spelling of 4015581 in words is "four million, fifteen thousand, five hundred eighty-one".