42118577 has 2 divisors, whose sum is σ = 42118578. Its totient is φ = 42118576.

The previous prime is 42118567. The next prime is 42118621. The reversal of 42118577 is 77581124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35988001 + 6130576 = 5999^2 + 2476^2 .

It is a cyclic number.

It is not a de Polignac number, because 42118577 - 2¹⁰ = 42117553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42118567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21059288 + 21059289.

It is an arithmetic number, because the mean of its divisors is an integer number (21059289).

Almost surely, 2^42118577 is an apocalyptic number.

It is an amenable number.

42118577 is a deficient number, since it is larger than the sum of its proper divisors (1).

42118577 is an equidigital number, since it uses as much as digits as its factorization.

42118577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15680, while the sum is 35.

The square root of 42118577 is about 6489.8826645788. The cubic root of 42118577 is about 347.9294815715.

The spelling of 42118577 in words is "forty-two million, one hundred eighteen thousand, five hundred seventy-seven".