4138531 has 8 divisors (see below), whose sum is σ = 4523904. Its totient is φ = 3768960.

The previous prime is 4138529. The next prime is 4138543. The reversal of 4138531 is 1358314.

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 4138531 - 2¹ = 4138529 is a prime.

It is a super-2 number, since 2×4138531² = 34254877675922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4138496 and 4138505.

It is not an unprimeable number, because it can be changed into a prime (4138591) 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, 3400 + ... + 4453.

It is an arithmetic number, because the mean of its divisors is an integer number (565488).

Almost surely, 2^4138531 is an apocalyptic number.

4138531 is a deficient number, since it is larger than the sum of its proper divisors (385373).

4138531 is a wasteful number, since it uses less digits than its factorization.

4138531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7901.

The product of its digits is 1440, while the sum is 25.

The square root of 4138531 is about 2034.3379758536. The cubic root of 4138531 is about 160.5518832791.

The spelling of 4138531 in words is "four million, one hundred thirty-eight thousand, five hundred thirty-one".