42538537 has 2 divisors, whose sum is σ = 42538538. Its totient is φ = 42538536.

The previous prime is 42538513. The next prime is 42538543. The reversal of 42538537 is 73583524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32672656 + 9865881 = 5716^2 + 3141^2 .

It is a cyclic number.

It is not a de Polignac number, because 42538537 - 2¹¹ = 42536489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42538496 and 42538505.

It is not a weakly prime, because it can be changed into another prime (42538597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21269268 + 21269269.

It is an arithmetic number, because the mean of its divisors is an integer number (21269269).

Almost surely, 2^42538537 is an apocalyptic number.

It is an amenable number.

42538537 is a deficient number, since it is larger than the sum of its proper divisors (1).

42538537 is an equidigital number, since it uses as much as digits as its factorization.

42538537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 37.

The square root of 42538537 is about 6522.1573884720. The cubic root of 42538537 is about 349.0820490007.

The spelling of 42538537 in words is "forty-two million, five hundred thirty-eight thousand, five hundred thirty-seven".