43745139 has 12 divisors (see below), whose sum is σ = 63259456. Its totient is φ = 29130192.

The previous prime is 43745099. The next prime is 43745167. The reversal of 43745139 is 93154734.

It is not a de Polignac number, because 43745139 - 2¹² = 43741043 is a prime.

It is a super-2 number, since 2×43745139² = 3827274372258642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43745179) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7614 + ... + 12060.

Almost surely, 2^43745139 is an apocalyptic number.

43745139 is a deficient number, since it is larger than the sum of its proper divisors (19514317).

43745139 is a wasteful number, since it uses less digits than its factorization.

43745139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5546 (or 5543 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 43745139 is about 6614.0108103933. The cubic root of 43745139 is about 352.3518858650.

The spelling of 43745139 in words is "forty-three million, seven hundred forty-five thousand, one hundred thirty-nine".