42513445 has 8 divisors (see below), whose sum is σ = 54940536. Its totient is φ = 31394496.

The previous prime is 42513397. The next prime is 42513463. The reversal of 42513445 is 54431524.

It can be written as a sum of positive squares in 4 ways, for example, as 859329 + 41654116 = 927^2 + 6454^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42513445 - 2⁹ = 42512933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326962 + ... + 327091.

It is an arithmetic number, because the mean of its divisors is an integer number (6867567).

Almost surely, 2^42513445 is an apocalyptic number.

It is an amenable number.

42513445 is a deficient number, since it is larger than the sum of its proper divisors (12427091).

42513445 is a wasteful number, since it uses less digits than its factorization.

42513445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654071.

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

The square root of 42513445 is about 6520.2335080885. The cubic root of 42513445 is about 349.0133983904.

Adding to 42513445 its reverse (54431524), we get a palindrome (96944969).

The spelling of 42513445 in words is "forty-two million, five hundred thirteen thousand, four hundred forty-five".