42112513 has 2 divisors, whose sum is σ = 42112514. Its totient is φ = 42112512.

The previous prime is 42112507. The next prime is 42112537. The reversal of 42112513 is 31521124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38044224 + 4068289 = 6168^2 + 2017^2 .

It is a cyclic number.

It is not a de Polignac number, because 42112513 - 2⁵ = 42112481 is a prime.

It is not a weakly prime, because it can be changed into another prime (42112613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21056256 + 21056257.

It is an arithmetic number, because the mean of its divisors is an integer number (21056257).

Almost surely, 2^42112513 is an apocalyptic number.

It is an amenable number.

42112513 is a deficient number, since it is larger than the sum of its proper divisors (1).

42112513 is an equidigital number, since it uses as much as digits as its factorization.

42112513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 19.

The square root of 42112513 is about 6489.4154590379. The cubic root of 42112513 is about 347.9127831153.

Adding to 42112513 its reverse (31521124), we get a palindrome (73633637).

It can be divided in two parts, 4211 and 2513, that added together give a square (6724 = 82²).

The spelling of 42112513 in words is "forty-two million, one hundred twelve thousand, five hundred thirteen".