453661 has 4 divisors (see below), whose sum is σ = 488572. Its totient is φ = 418752.

The previous prime is 453659. The next prime is 453667. The reversal of 453661 is 166354.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166354 = 2 ⋅83177.

It can be written as a sum of positive squares in 2 ways, for example, as 37636 + 416025 = 194^2 + 645^2 .

It is a cyclic number.

It is not a de Polignac number, because 453661 - 2¹ = 453659 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 (453667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17436 + ... + 17461.

It is an arithmetic number, because the mean of its divisors is an integer number (122143).

2⁴⁵³⁶⁶¹ is an apocalyptic number.

It is an amenable number.

453661 is a deficient number, since it is larger than the sum of its proper divisors (34911).

453661 is a wasteful number, since it uses less digits than its factorization.

453661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34910.

The product of its digits is 2160, while the sum is 25.

The square root of 453661 is about 673.5436140296. The cubic root of 453661 is about 76.8381939834.

The spelling of 453661 in words is "four hundred fifty-three thousand, six hundred sixty-one".