4281621 has 8 divisors (see below), whose sum is σ = 5718720. Its totient is φ = 2849472.

The previous prime is 4281619. The next prime is 4281643. The reversal of 4281621 is 1261824.

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

It is not a de Polignac number, because 4281621 - 2¹ = 4281619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4281591 and 4281600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4281601) 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, 1981 + ... + 3533.

It is an arithmetic number, because the mean of its divisors is an integer number (714840).

Almost surely, 2^4281621 is an apocalyptic number.

It is an amenable number.

4281621 is a deficient number, since it is larger than the sum of its proper divisors (1437099).

4281621 is a wasteful number, since it uses less digits than its factorization.

4281621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2475.

The product of its digits is 768, while the sum is 24.

The square root of 4281621 is about 2069.2078194324. The cubic root of 4281621 is about 162.3813224210.

It can be divided in two parts, 4 and 281621, that added together give a triangular number (281625 = T₇₅₀).

The spelling of 4281621 in words is "four million, two hundred eighty-one thousand, six hundred twenty-one".