42648081 has 24 divisors (see below), whose sum is σ = 66495744. Its totient is φ = 24242400.

The previous prime is 42648059. The next prime is 42648107. The reversal of 42648081 is 18084624.

It is not a de Polignac number, because 42648081 - 2¹⁰ = 42647057 is a prime.

It is a super-2 number, since 2×42648081² = 3637717625965122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42648181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32131 + ... + 33431.

It is an arithmetic number, because the mean of its divisors is an integer number (2770656).

Almost surely, 2^42648081 is an apocalyptic number.

It is an amenable number.

42648081 is a deficient number, since it is larger than the sum of its proper divisors (23847663).

42648081 is a wasteful number, since it uses less digits than its factorization.

42648081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541 (or 1534 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 42648081 is about 6530.5498237132. The cubic root of 42648081 is about 349.3814407902.

The spelling of 42648081 in words is "forty-two million, six hundred forty-eight thousand, eighty-one".