4202661 has 4 divisors (see below), whose sum is σ = 5603552. Its totient is φ = 2801772.

The previous prime is 4202657. The next prime is 4202663. The reversal of 4202661 is 1662024.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4202661 - 2² = 4202657 is a prime.

It is a d-powerful number, because it can be written as 4¹¹ + 2⁵ + 0 + 2⁹ + 6² + 6⁵ + 1 .

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4202663) 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, 700441 + ... + 700446.

It is an arithmetic number, because the mean of its divisors is an integer number (1400888).

Almost surely, 2^4202661 is an apocalyptic number.

It is an amenable number.

4202661 is a deficient number, since it is larger than the sum of its proper divisors (1400891).

4202661 is a wasteful number, since it uses less digits than its factorization.

4202661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400890.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 4202661 is about 2050.0392679166. The cubic root of 4202661 is about 161.3769314853.

Adding to 4202661 its reverse (1662024), we get a palindrome (5864685).

It can be divided in two parts, 420 and 2661, that added together give a triangular number (3081 = T₇₈).

The spelling of 4202661 in words is "four million, two hundred two thousand, six hundred sixty-one".