4215641 has 2 divisors, whose sum is σ = 4215642. Its totient is φ = 4215640.

The previous prime is 4215619. The next prime is 4215683. The reversal of 4215641 is 1465124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3225616 + 990025 = 1796^2 + 995^2 .

It is a cyclic number.

It is not a de Polignac number, because 4215641 - 2⁶ = 4215577 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4215041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2107820 + 2107821.

It is an arithmetic number, because the mean of its divisors is an integer number (2107821).

Almost surely, 2^4215641 is an apocalyptic number.

It is an amenable number.

4215641 is a deficient number, since it is larger than the sum of its proper divisors (1).

4215641 is an equidigital number, since it uses as much as digits as its factorization.

4215641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 23.

The square root of 4215641 is about 2053.2026202983. The cubic root of 4215641 is about 161.5428993315.

The spelling of 4215641 in words is "four million, two hundred fifteen thousand, six hundred forty-one".