42526643 has 4 divisors (see below), whose sum is σ = 42965160. Its totient is φ = 42088128.

The previous prime is 42526621. The next prime is 42526651. The reversal of 42526643 is 34662524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42526643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42526343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219113 + ... + 219306.

It is an arithmetic number, because the mean of its divisors is an integer number (10741290).

Almost surely, 2^42526643 is an apocalyptic number.

42526643 is a deficient number, since it is larger than the sum of its proper divisors (438517).

42526643 is an equidigital number, since it uses as much as digits as its factorization.

42526643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438516.

The product of its digits is 34560, while the sum is 32.

The square root of 42526643 is about 6521.2455098700. The cubic root of 42526643 is about 349.0495109053.

The spelling of 42526643 in words is "forty-two million, five hundred twenty-six thousand, six hundred forty-three".