4288621 has 2 divisors, whose sum is σ = 4288622. Its totient is φ = 4288620.

The previous prime is 4288619. The next prime is 4288637. The reversal of 4288621 is 1268824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4284900 + 3721 = 2070^2 + 61^2 .

It is a cyclic number.

It is not a de Polignac number, because 4288621 - 2¹ = 4288619 is a prime.

Together with 4288619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4288681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2144310 + 2144311.

It is an arithmetic number, because the mean of its divisors is an integer number (2144311).

Almost surely, 2^4288621 is an apocalyptic number.

It is an amenable number.

4288621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4288621 is an equidigital number, since it uses as much as digits as its factorization.

4288621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 31.

The square root of 4288621 is about 2070.8985972278. The cubic root of 4288621 is about 162.4697663674.

The spelling of 4288621 in words is "four million, two hundred eighty-eight thousand, six hundred twenty-one".