4215961 has 4 divisors (see below), whose sum is σ = 4223412. Its totient is φ = 4208512.

The previous prime is 4215941. The next prime is 4215971. The reversal of 4215961 is 1695124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 291600 + 3924361 = 540^2 + 1981^2 .

It is a cyclic number.

It is not a de Polignac number, because 4215961 - 2⁷ = 4215833 is a prime.

It is a Duffinian number.

4215961 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4215941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2800 + ... + 4033.

It is an arithmetic number, because the mean of its divisors is an integer number (1055853).

Almost surely, 2^4215961 is an apocalyptic number.

It is an amenable number.

4215961 is a deficient number, since it is larger than the sum of its proper divisors (7451).

4215961 is an equidigital number, since it uses as much as digits as its factorization.

4215961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7450.

The product of its digits is 2160, while the sum is 28.

The square root of 4215961 is about 2053.2805458583. The cubic root of 4215961 is about 161.5469866831.

The spelling of 4215961 in words is "four million, two hundred fifteen thousand, nine hundred sixty-one".