42739241 has 4 divisors (see below), whose sum is σ = 45253332. Its totient is φ = 40225152.

The previous prime is 42739217. The next prime is 42739247. The reversal of 42739241 is 14293724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26739241 + 16000000 = 5171^2 + 4000^2 .

It is a cyclic number.

It is not a de Polignac number, because 42739241 - 2¹⁴ = 42722857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42739198 and 42739207.

It is not an unprimeable number, because it can be changed into a prime (42739247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1257020 + ... + 1257053.

It is an arithmetic number, because the mean of its divisors is an integer number (11313333).

Almost surely, 2^42739241 is an apocalyptic number.

It is an amenable number.

42739241 is a deficient number, since it is larger than the sum of its proper divisors (2514091).

42739241 is a wasteful number, since it uses less digits than its factorization.

42739241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514090.

The product of its digits is 12096, while the sum is 32.

The square root of 42739241 is about 6537.5256022443. The cubic root of 42739241 is about 349.6301971666.

The spelling of 42739241 in words is "forty-two million, seven hundred thirty-nine thousand, two hundred forty-one".