42642533 has 2 divisors, whose sum is σ = 42642534. Its totient is φ = 42642532.

The previous prime is 42642521. The next prime is 42642539. The reversal of 42642533 is 33524624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42601729 + 40804 = 6527^2 + 202^2 .

It is a cyclic number.

It is not a de Polignac number, because 42642533 - 2¹² = 42638437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42642496 and 42642505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42642539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21321266 + 21321267.

It is an arithmetic number, because the mean of its divisors is an integer number (21321267).

Almost surely, 2^42642533 is an apocalyptic number.

It is an amenable number.

42642533 is a deficient number, since it is larger than the sum of its proper divisors (1).

42642533 is an equidigital number, since it uses as much as digits as its factorization.

42642533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 29.

The square root of 42642533 is about 6530.1250370877. The cubic root of 42642533 is about 349.3662900320.

The spelling of 42642533 in words is "forty-two million, six hundred forty-two thousand, five hundred thirty-three".