4139531 has 6 divisors (see below), whose sum is σ = 4550196. Its totient is φ = 3763100.

The previous prime is 4139503. The next prime is 4139533. The reversal of 4139531 is 1359314.

It is not a de Polignac number, because 4139531 - 2¹⁰ = 4138507 is a prime.

It is a super-2 number, since 2×4139531² = 34271433799922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4139531.

It is not an unprimeable number, because it can be changed into a prime (4139533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16985 + ... + 17226.

It is an arithmetic number, because the mean of its divisors is an integer number (758366).

Almost surely, 2^4139531 is an apocalyptic number.

4139531 is a deficient number, since it is larger than the sum of its proper divisors (410665).

4139531 is a wasteful number, since it uses less digits than its factorization.

4139531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34233 (or 34222 counting only the distinct ones).

The product of its digits is 1620, while the sum is 26.

The square root of 4139531 is about 2034.5837412110. The cubic root of 4139531 is about 160.5648137089.

The spelling of 4139531 in words is "four million, one hundred thirty-nine thousand, five hundred thirty-one".