43500042 has 24 divisors (see below), whose sum is σ = 99794916. Its totient is φ = 13646976.

The previous prime is 43500031. The next prime is 43500053. The reversal of 43500042 is 24000534.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (43500031) and next prime (43500053).

It can be written as a sum of positive squares in 2 ways, for example, as 41486481 + 2013561 = 6441^2 + 1419^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 43499988 and 43500024.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 70773 + ... + 71384.

Almost surely, 2^43500042 is an apocalyptic number.

43500042 is an abundant number, since it is smaller than the sum of its proper divisors (56294874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43500042 is a wasteful number, since it uses less digits than its factorization.

43500042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142182 (or 142179 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 43500042 is about 6595.4561631475. The cubic root of 43500042 is about 351.6925959882.

Adding to 43500042 its reverse (24000534), we get a palindrome (67500576).

The spelling of 43500042 in words is "forty-three million, five hundred thousand, forty-two".