43742257 has 8 divisors (see below), whose sum is σ = 47753384. Its totient is φ = 39823488.

The previous prime is 43742249. The next prime is 43742261. The reversal of 43742257 is 75224734.

43742257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2217121 + 41525136 = 1489^2 + 6444^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 43742257 - 2³ = 43742249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43742227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22098 + ... + 23995.

It is an arithmetic number, because the mean of its divisors is an integer number (5969173).

Almost surely, 2^43742257 is an apocalyptic number.

It is an amenable number.

43742257 is a deficient number, since it is larger than the sum of its proper divisors (4011127).

43742257 is a wasteful number, since it uses less digits than its factorization.

43742257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46179.

The product of its digits is 47040, while the sum is 34.

The square root of 43742257 is about 6613.7929359786. The cubic root of 43742257 is about 352.3441478590.

The spelling of 43742257 in words is "forty-three million, seven hundred forty-two thousand, two hundred fifty-seven".