4215381 has 4 divisors (see below), whose sum is σ = 5620512. Its totient is φ = 2810252.

The previous prime is 4215347. The next prime is 4215389. The reversal of 4215381 is 1835124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4215381 - 2⁶ = 4215317 is a prime.

It is a super-2 number, since 2×4215381² = 35538873950322, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4215389) 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, 702561 + ... + 702566.

It is an arithmetic number, because the mean of its divisors is an integer number (1405128).

Almost surely, 2^4215381 is an apocalyptic number.

It is an amenable number.

4215381 is a deficient number, since it is larger than the sum of its proper divisors (1405131).

4215381 is a wasteful number, since it uses less digits than its factorization.

4215381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405130.

The product of its digits is 960, while the sum is 24.

The square root of 4215381 is about 2053.1393036031. The cubic root of 4215381 is about 161.5395782061.

The spelling of 4215381 in words is "four million, two hundred fifteen thousand, three hundred eighty-one".