4259621 has 2 divisors, whose sum is σ = 4259622. Its totient is φ = 4259620.

The previous prime is 4259599. The next prime is 4259627. The reversal of 4259621 is 1269524.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4202500 + 57121 = 2050^2 + 239^2 .

It is a cyclic number.

It is not a de Polignac number, because 4259621 - 2¹⁴ = 4243237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4259627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2129810 + 2129811.

It is an arithmetic number, because the mean of its divisors is an integer number (2129811).

Almost surely, 2^4259621 is an apocalyptic number.

It is an amenable number.

4259621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4259621 is an equidigital number, since it uses as much as digits as its factorization.

4259621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 4259621 is about 2063.8849289629. The cubic root of 4259621 is about 162.1027265950.

The spelling of 4259621 in words is "four million, two hundred fifty-nine thousand, six hundred twenty-one".