42158737 has 2 divisors, whose sum is σ = 42158738. Its totient is φ = 42158736.

The previous prime is 42158731. The next prime is 42158789. The reversal of 42158737 is 73785124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36978561 + 5180176 = 6081^2 + 2276^2 .

It is a cyclic number.

It is not a de Polignac number, because 42158737 - 2¹⁵ = 42125969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42158696 and 42158705.

It is not a weakly prime, because it can be changed into another prime (42158731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21079368 + 21079369.

It is an arithmetic number, because the mean of its divisors is an integer number (21079369).

Almost surely, 2^42158737 is an apocalyptic number.

It is an amenable number.

42158737 is a deficient number, since it is larger than the sum of its proper divisors (1).

42158737 is an equidigital number, since it uses as much as digits as its factorization.

42158737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 37.

The square root of 42158737 is about 6492.9759740815. The cubic root of 42158737 is about 348.0400298560.

The spelling of 42158737 in words is "forty-two million, one hundred fifty-eight thousand, seven hundred thirty-seven".