4055661 has 12 divisors (see below), whose sum is σ = 5939388. Its totient is φ = 2666304.

The previous prime is 4055657. The next prime is 4055669. The reversal of 4055661 is 1665504.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 837225 + 3218436 = 915^2 + 1794^2 .

It is not a de Polignac number, because 4055661 - 2² = 4055657 is a prime.

It is a super-2 number, since 2×4055661² = 32896772293842, which contains 22 as substring.

4055661 is a lucky number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4055669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2430 + ... + 3743.

It is an arithmetic number, because the mean of its divisors is an integer number (494949).

Almost surely, 2^4055661 is an apocalyptic number.

It is an amenable number.

4055661 is a deficient number, since it is larger than the sum of its proper divisors (1883727).

4055661 is a wasteful number, since it uses less digits than its factorization.

4055661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6252 (or 6249 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 4055661 is about 2013.8671753619. The cubic root of 4055661 is about 159.4730188275.

The spelling of 4055661 in words is "four million, fifty-five thousand, six hundred sixty-one".