42166057 has 2 divisors, whose sum is σ = 42166058. Its totient is φ = 42166056.

The previous prime is 42166049. The next prime is 42166079. The reversal of 42166057 is 75066124.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41847961 + 318096 = 6469^2 + 564^2 .

It is a cyclic number.

It is not a de Polignac number, because 42166057 - 2³ = 42166049 is a prime.

It is not a weakly prime, because it can be changed into another prime (42146057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21083028 + 21083029.

It is an arithmetic number, because the mean of its divisors is an integer number (21083029).

Almost surely, 2^42166057 is an apocalyptic number.

It is an amenable number.

42166057 is a deficient number, since it is larger than the sum of its proper divisors (1).

42166057 is an equidigital number, since it uses as much as digits as its factorization.

42166057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 42166057 is about 6493.5396356687. The cubic root of 42166057 is about 348.0601720279.

The spelling of 42166057 in words is "forty-two million, one hundred sixty-six thousand, fifty-seven".