42521767 has 2 divisors, whose sum is σ = 42521768. Its totient is φ = 42521766.

The previous prime is 42521761. The next prime is 42521771. The reversal of 42521767 is 76712524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42521767 - 2²³ = 34133159 is a prime.

It is equal to p_2577436 and since 42521767 and 2577436 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42521761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21260883 + 21260884.

It is an arithmetic number, because the mean of its divisors is an integer number (21260884).

Almost surely, 2^42521767 is an apocalyptic number.

42521767 is a deficient number, since it is larger than the sum of its proper divisors (1).

42521767 is an equidigital number, since it uses as much as digits as its factorization.

42521767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23520, while the sum is 34.

The square root of 42521767 is about 6520.8716441899. The cubic root of 42521767 is about 349.0361700101.

The spelling of 42521767 in words is "forty-two million, five hundred twenty-one thousand, seven hundred sixty-seven".