42072571 has 2 divisors, whose sum is σ = 42072572. Its totient is φ = 42072570.

The previous prime is 42072559. The next prime is 42072587. The reversal of 42072571 is 17527024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42072571 - 2⁵ = 42072539 is a prime.

It is a Chen prime.

It is equal to p_2551735 and since 42072571 and 2551735 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42072271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21036285 + 21036286.

It is an arithmetic number, because the mean of its divisors is an integer number (21036286).

Almost surely, 2^42072571 is an apocalyptic number.

42072571 is a deficient number, since it is larger than the sum of its proper divisors (1).

42072571 is an equidigital number, since it uses as much as digits as its factorization.

42072571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 42072571 is about 6486.3372561100. The cubic root of 42072571 is about 347.8027546299.

Adding to 42072571 its reverse (17527024), we get a palindrome (59599595).

The spelling of 42072571 in words is "forty-two million, seventy-two thousand, five hundred seventy-one".