42550637 has 2 divisors, whose sum is σ = 42550638. Its totient is φ = 42550636.

The previous prime is 42550603. The next prime is 42550649. The reversal of 42550637 is 73605524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28793956 + 13756681 = 5366^2 + 3709^2 .

It is a cyclic number.

It is not a de Polignac number, because 42550637 - 2¹⁶ = 42485101 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42550687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21275318 + 21275319.

It is an arithmetic number, because the mean of its divisors is an integer number (21275319).

Almost surely, 2^42550637 is an apocalyptic number.

It is an amenable number.

42550637 is a deficient number, since it is larger than the sum of its proper divisors (1).

42550637 is an equidigital number, since it uses as much as digits as its factorization.

42550637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 42550637 is about 6523.0849296939. The cubic root of 42550637 is about 349.1151444216.

The spelling of 42550637 in words is "forty-two million, five hundred fifty thousand, six hundred thirty-seven".