42849745 has 4 divisors (see below), whose sum is σ = 51419700. Its totient is φ = 34279792.

The previous prime is 42849727. The next prime is 42849749. The reversal of 42849745 is 54794824.

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 31371201 + 11478544 = 5601^2 + 3388^2 .

It is a cyclic number.

It is not a de Polignac number, because 42849745 - 2¹³ = 42841553 is a prime.

It is a super-3 number, since 3×42849745³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (42849749) 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, 4284970 + ... + 4284979.

It is an arithmetic number, because the mean of its divisors is an integer number (12854925).

Almost surely, 2^42849745 is an apocalyptic number.

It is an amenable number.

42849745 is a deficient number, since it is larger than the sum of its proper divisors (8569955).

42849745 is an equidigital number, since it uses as much as digits as its factorization.

42849745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8569954.

The product of its digits is 322560, while the sum is 43.

The square root of 42849745 is about 6545.9716620224. The cubic root of 42849745 is about 349.9312654140.

The spelling of 42849745 in words is "forty-two million, eight hundred forty-nine thousand, seven hundred forty-five".