4001385 has 8 divisors (see below), whose sum is σ = 6402240. Its totient is φ = 2134064.

The previous prime is 4001383. The next prime is 4001399. The reversal of 4001385 is 5831004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4001385 - 2¹ = 4001383 is a prime.

It is a super-2 number, since 2×4001385² = 32022163836450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4001383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133365 + ... + 133394.

It is an arithmetic number, because the mean of its divisors is an integer number (800280).

Almost surely, 2^4001385 is an apocalyptic number.

It is an amenable number.

4001385 is a deficient number, since it is larger than the sum of its proper divisors (2400855).

4001385 is a wasteful number, since it uses less digits than its factorization.

4001385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266767.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 4001385 is about 2000.3462200329. The cubic root of 4001385 is about 158.7584243365.

Adding to 4001385 its reverse (5831004), we get a palindrome (9832389).

The spelling of 4001385 in words is "four million, one thousand, three hundred eighty-five".