4181439 has 16 divisors (see below), whose sum is σ = 5951232. Its totient is φ = 2602368.

The previous prime is 4181431. The next prime is 4181447. The reversal of 4181439 is 9341814.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4181431) and next prime (4181447).

It is not a de Polignac number, because 4181439 - 2³ = 4181431 is a prime.

It is a super-2 number, since 2×4181439² = 34968864221442, which contains 22 as substring.

4181439 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4181431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8062 + ... + 8564.

It is an arithmetic number, because the mean of its divisors is an integer number (371952).

Almost surely, 2^4181439 is an apocalyptic number.

4181439 is a deficient number, since it is larger than the sum of its proper divisors (1769793).

4181439 is a wasteful number, since it uses less digits than its factorization.

4181439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686.

The product of its digits is 3456, while the sum is 30.

The square root of 4181439 is about 2044.8567186969. The cubic root of 4181439 is about 161.1048402192.

The spelling of 4181439 in words is "four million, one hundred eighty-one thousand, four hundred thirty-nine".