42513473 has 4 divisors (see below), whose sum is σ = 43315668. Its totient is φ = 41711280.

The previous prime is 42513463. The next prime is 42513487. The reversal of 42513473 is 37431524.

It is a happy number.

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 13601344 + 28912129 = 3688^2 + 5377^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42513473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42513463) 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, 401018 + ... + 401123.

It is an arithmetic number, because the mean of its divisors is an integer number (10828917).

Almost surely, 2^42513473 is an apocalyptic number.

It is an amenable number.

42513473 is a deficient number, since it is larger than the sum of its proper divisors (802195).

42513473 is an equidigital number, since it uses as much as digits as its factorization.

42513473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802194.

The product of its digits is 10080, while the sum is 29.

The square root of 42513473 is about 6520.2356552505. The cubic root of 42513473 is about 349.0134750122.

Adding to 42513473 its reverse (37431524), we get a palindrome (79944997).

The spelling of 42513473 in words is "forty-two million, five hundred thirteen thousand, four hundred seventy-three".