4215997 has 4 divisors (see below), whose sum is σ = 4237596. Its totient is φ = 4194400.

The previous prime is 4215979. The next prime is 4216001. The reversal of 4215997 is 7995124.

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 2802276 + 1413721 = 1674^2 + 1189^2 .

It is a cyclic number.

It is not a de Polignac number, because 4215997 - 2¹¹ = 4213949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4215697) 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, 10504 + ... + 10897.

It is an arithmetic number, because the mean of its divisors is an integer number (1059399).

Almost surely, 2^4215997 is an apocalyptic number.

It is an amenable number.

4215997 is a deficient number, since it is larger than the sum of its proper divisors (21599).

4215997 is a wasteful number, since it uses less digits than its factorization.

4215997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21598.

The product of its digits is 22680, while the sum is 37.

The square root of 4215997 is about 2053.2893122987. The cubic root of 4215997 is about 161.5474464972.

The spelling of 4215997 in words is "four million, two hundred fifteen thousand, nine hundred ninety-seven".