42288641 has 4 divisors (see below), whose sum is σ = 43746900. Its totient is φ = 40830384.

The previous prime is 42288601. The next prime is 42288691. The reversal of 42288641 is 14688224.

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 28569025 + 13719616 = 5345^2 + 3704^2 .

It is a cyclic number.

It is not a de Polignac number, because 42288641 - 2⁶ = 42288577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42288601) 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, 729086 + ... + 729143.

It is an arithmetic number, because the mean of its divisors is an integer number (10936725).

Almost surely, 2^42288641 is an apocalyptic number.

It is an amenable number.

42288641 is a deficient number, since it is larger than the sum of its proper divisors (1458259).

42288641 is a wasteful number, since it uses less digits than its factorization.

42288641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1458258.

The product of its digits is 24576, while the sum is 35.

The square root of 42288641 is about 6502.9717053052. The cubic root of 42288641 is about 348.3971360175.

The spelling of 42288641 in words is "forty-two million, two hundred eighty-eight thousand, six hundred forty-one".