42534637 has 2 divisors, whose sum is σ = 42534638. Its totient is φ = 42534636.

The previous prime is 42534601. The next prime is 42534641. The reversal of 42534637 is 73643524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27394756 + 15139881 = 5234^2 + 3891^2 .

It is a cyclic number.

It is not a de Polignac number, because 42534637 - 2¹⁵ = 42501869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42534937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21267318 + 21267319.

It is an arithmetic number, because the mean of its divisors is an integer number (21267319).

Almost surely, 2^42534637 is an apocalyptic number.

It is an amenable number.

42534637 is a deficient number, since it is larger than the sum of its proper divisors (1).

42534637 is an equidigital number, since it uses as much as digits as its factorization.

42534637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 34.

The square root of 42534637 is about 6521.8584007934. The cubic root of 42534637 is about 349.0713805442.

The spelling of 42534637 in words is "forty-two million, five hundred thirty-four thousand, six hundred thirty-seven".