42642623 has 2 divisors, whose sum is σ = 42642624. Its totient is φ = 42642622.

The previous prime is 42642617. The next prime is 42642629. The reversal of 42642623 is 32624624.

It is a balanced prime because it is at equal distance from previous prime (42642617) and next prime (42642629).

It is a cyclic number.

It is not a de Polignac number, because 42642623 - 2¹⁴ = 42626239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42642629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21321311 + 21321312.

It is an arithmetic number, because the mean of its divisors is an integer number (21321312).

Almost surely, 2^42642623 is an apocalyptic number.

42642623 is a deficient number, since it is larger than the sum of its proper divisors (1).

42642623 is an equidigital number, since it uses as much as digits as its factorization.

42642623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 29.

The square root of 42642623 is about 6530.1319282232. The cubic root of 42642623 is about 349.3665358190.

The spelling of 42642623 in words is "forty-two million, six hundred forty-two thousand, six hundred twenty-three".