5635621 has 8 divisors (see below), whose sum is σ = 5981760. Its totient is φ = 5297952.

The previous prime is 5635613. The next prime is 5635633. The reversal of 5635621 is 1265365.

5635621 = T₂₁₄ + T₂₁₅ + ... + T₃₅₁.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5635621 - 2³ = 5635613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5635621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5635601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 720 + ... + 3433.

It is an arithmetic number, because the mean of its divisors is an integer number (747720).

Almost surely, 2^5635621 is an apocalyptic number.

It is an amenable number.

5635621 is a deficient number, since it is larger than the sum of its proper divisors (346139).

5635621 is a wasteful number, since it uses less digits than its factorization.

5635621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4235.

The product of its digits is 5400, while the sum is 28.

The square root of 5635621 is about 2373.9462925686. The cubic root of 5635621 is about 177.9565289627.

It can be divided in two parts, 5635 and 621, that multiplied together give a triangular number (3499335 = T₂₆₄₅).

The spelling of 5635621 in words is "five million, six hundred thirty-five thousand, six hundred twenty-one".