42454513 has 4 divisors (see below), whose sum is σ = 42931620. Its totient is φ = 41977408.

The previous prime is 42454507. The next prime is 42454523. The reversal of 42454513 is 31545424.

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 9138529 + 33315984 = 3023^2 + 5772^2 .

It is a cyclic number.

It is not a de Polignac number, because 42454513 - 2⁹ = 42454001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42454523) 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, 238420 + ... + 238597.

It is an arithmetic number, because the mean of its divisors is an integer number (10732905).

Almost surely, 2^42454513 is an apocalyptic number.

It is an amenable number.

42454513 is a deficient number, since it is larger than the sum of its proper divisors (477107).

42454513 is an equidigital number, since it uses as much as digits as its factorization.

42454513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477106.

The product of its digits is 9600, while the sum is 28.

The square root of 42454513 is about 6515.7127775862. The cubic root of 42454513 is about 348.8520567355.

Adding to 42454513 its reverse (31545424), we get a palindrome (73999937).

The spelling of 42454513 in words is "forty-two million, four hundred fifty-four thousand, five hundred thirteen".