4537661 has 4 divisors (see below), whose sum is σ = 4643232. Its totient is φ = 4432092.

The previous prime is 4537633. The next prime is 4537669. The reversal of 4537661 is 1667354.

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 a cyclic number.

It is not a de Polignac number, because 4537661 - 2⁶ = 4537597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4537669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52721 + ... + 52806.

It is an arithmetic number, because the mean of its divisors is an integer number (1160808).

Almost surely, 2^4537661 is an apocalyptic number.

It is an amenable number.

4537661 is a deficient number, since it is larger than the sum of its proper divisors (105571).

4537661 is a wasteful number, since it uses less digits than its factorization.

4537661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105570.

The product of its digits is 15120, while the sum is 32.

The square root of 4537661 is about 2130.1786310073. The cubic root of 4537661 is about 165.5556534657. Note that the first 3 decimals are identical.

The spelling of 4537661 in words is "four million, five hundred thirty-seven thousand, six hundred sixty-one".