42645959 has 2 divisors, whose sum is σ = 42645960. Its totient is φ = 42645958.

The previous prime is 42645947. The next prime is 42645961. The reversal of 42645959 is 95954624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42645959 - 2¹⁶ = 42580423 is a prime.

Together with 42645961, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42645919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21322979 + 21322980.

It is an arithmetic number, because the mean of its divisors is an integer number (21322980).

Almost surely, 2^42645959 is an apocalyptic number.

42645959 is a deficient number, since it is larger than the sum of its proper divisors (1).

42645959 is an equidigital number, since it uses as much as digits as its factorization.

42645959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 44.

The square root of 42645959 is about 6530.3873545143. The cubic root of 42645959 is about 349.3756460808.

The spelling of 42645959 in words is "forty-two million, six hundred forty-five thousand, nine hundred fifty-nine".