4030661 has 4 divisors (see below), whose sum is σ = 4056492. Its totient is φ = 4004832.

The previous prime is 4030657. The next prime is 4030687. The reversal of 4030661 is 1660304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2356225 + 1674436 = 1535^2 + 1294^2 .

It is a cyclic number.

It is not a de Polignac number, because 4030661 - 2² = 4030657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4030561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12680 + ... + 12993.

It is an arithmetic number, because the mean of its divisors is an integer number (1014123).

Almost surely, 2^4030661 is an apocalyptic number.

It is an amenable number.

4030661 is a deficient number, since it is larger than the sum of its proper divisors (25831).

4030661 is a wasteful number, since it uses less digits than its factorization.

4030661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25830.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 4030661 is about 2007.6506170148. The cubic root of 4030661 is about 159.1446674577.

Adding to 4030661 its reverse (1660304), we get a palindrome (5690965).

The spelling of 4030661 in words is "four million, thirty thousand, six hundred sixty-one".