42555577 has 2 divisors, whose sum is σ = 42555578. Its totient is φ = 42555576.

The previous prime is 42555571. The next prime is 42555619. The reversal of 42555577 is 77555524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27415696 + 15139881 = 5236^2 + 3891^2 .

It is a cyclic number.

It is not a de Polignac number, because 42555577 - 2¹⁹ = 42031289 is a prime.

It is not a weakly prime, because it can be changed into another prime (42555571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21277788 + 21277789.

It is an arithmetic number, because the mean of its divisors is an integer number (21277789).

Almost surely, 2^42555577 is an apocalyptic number.

It is an amenable number.

42555577 is a deficient number, since it is larger than the sum of its proper divisors (1).

42555577 is an equidigital number, since it uses as much as digits as its factorization.

42555577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 245000, while the sum is 40.

The square root of 42555577 is about 6523.4635739000. The cubic root of 42555577 is about 349.1286543022.

The spelling of 42555577 in words is "forty-two million, five hundred fifty-five thousand, five hundred seventy-seven".