4155581 has 8 divisors (see below), whose sum is σ = 4406784. Its totient is φ = 3911760.

The previous prime is 4155551. The next prime is 4155583. The reversal of 4155581 is 1855514.

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

It is a cyclic number.

It is not a de Polignac number, because 4155581 - 2⁶ = 4155517 is a prime.

It is a super-2 number, since 2×4155581² = 34537706895122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4155583) 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, 665 + ... + 2958.

It is an arithmetic number, because the mean of its divisors is an integer number (550848).

Almost surely, 2^4155581 is an apocalyptic number.

It is an amenable number.

4155581 is a deficient number, since it is larger than the sum of its proper divisors (251203).

4155581 is a wasteful number, since it uses less digits than its factorization.

4155581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3691.

The product of its digits is 4000, while the sum is 29.

The square root of 4155581 is about 2038.5242210972. The cubic root of 4155581 is about 160.7720627727.

The spelling of 4155581 in words is "four million, one hundred fifty-five thousand, five hundred eighty-one".