4185138 has 8 divisors (see below), whose sum is σ = 8370288. Its totient is φ = 1395044.

The previous prime is 4185133. The next prime is 4185143. The reversal of 4185138 is 8315814.

It is an interprime number because it is at equal distance from previous prime (4185133) and next prime (4185143).

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

4185138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (4185131) 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, 348756 + ... + 348767.

It is an arithmetic number, because the mean of its divisors is an integer number (1046286).

Almost surely, 2^4185138 is an apocalyptic number.

4185138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4185138 is a wasteful number, since it uses less digits than its factorization.

4185138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697528.

The product of its digits is 3840, while the sum is 30.

The square root of 4185138 is about 2045.7609831063. The cubic root of 4185138 is about 161.1523319373.

The spelling of 4185138 in words is "four million, one hundred eighty-five thousand, one hundred thirty-eight".