43139541 has 8 divisors (see below), whose sum is σ = 57685600. Its totient is φ = 28676592.

The previous prime is 43139539. The next prime is 43139543. The reversal of 43139541 is 14593134.

It is an interprime number because it is at equal distance from previous prime (43139539) and next prime (43139543).

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

It is not a de Polignac number, because 43139541 - 2¹ = 43139539 is a prime.

It is a super-2 number, since 2×43139541² = 3722039995381362, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43139499 and 43139508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43139543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19555 + ... + 21648.

It is an arithmetic number, because the mean of its divisors is an integer number (7210700).

Almost surely, 2^43139541 is an apocalyptic number.

It is an amenable number.

43139541 is a deficient number, since it is larger than the sum of its proper divisors (14546059).

43139541 is a wasteful number, since it uses less digits than its factorization.

43139541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41555.

The product of its digits is 6480, while the sum is 30.

The square root of 43139541 is about 6568.0698077898. The cubic root of 43139541 is about 350.7183640274.

The spelling of 43139541 in words is "forty-three million, one hundred thirty-nine thousand, five hundred forty-one".