43781042 has 8 divisors (see below), whose sum is σ = 66748332. Its totient is φ = 21531600.

The previous prime is 43781033. The next prime is 43781051. The reversal of 43781042 is 24018734.

It is an interprime number because it is at equal distance from previous prime (43781033) and next prime (43781051).

It can be written as a sum of positive squares in 2 ways, for example, as 35652841 + 8128201 = 5971^2 + 2851^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 43780996 and 43781014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179309 + ... + 179552.

Almost surely, 2^43781042 is an apocalyptic number.

43781042 is a deficient number, since it is larger than the sum of its proper divisors (22967290).

43781042 is a wasteful number, since it uses less digits than its factorization.

43781042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358924.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 43781042 is about 6616.7244162047. The cubic root of 43781042 is about 352.4482548996.

Adding to 43781042 its reverse (24018734), we get a palindrome (67799776).

The spelling of 43781042 in words is "forty-three million, seven hundred eighty-one thousand, forty-two".