42140513 has 4 divisors (see below), whose sum is σ = 42155028. Its totient is φ = 42126000.

The previous prime is 42140503. The next prime is 42140519. The reversal of 42140513 is 31504124.

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 24433249 + 17707264 = 4943^2 + 4208^2 .

It is a cyclic number.

It is not a de Polignac number, because 42140513 - 2⁸ = 42140257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42140519) 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, 1238 + ... + 9263.

It is an arithmetic number, because the mean of its divisors is an integer number (10538757).

Almost surely, 2^42140513 is an apocalyptic number.

It is an amenable number.

42140513 is a deficient number, since it is larger than the sum of its proper divisors (14515).

42140513 is a wasteful number, since it uses less digits than its factorization.

42140513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14514.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 42140513 is about 6491.5724597358. The cubic root of 42140513 is about 347.9898734227.

Adding to 42140513 its reverse (31504124), we get a palindrome (73644637).

The spelling of 42140513 in words is "forty-two million, one hundred forty thousand, five hundred thirteen".