42454739 has 4 divisors (see below), whose sum is σ = 42489720. Its totient is φ = 42419760.

The previous prime is 42454733. The next prime is 42454777. The reversal of 42454739 is 93745424.

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

It is a cyclic number.

It is not a de Polignac number, because 42454739 - 2¹² = 42450643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42454733) 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, 15602 + ... + 18119.

It is an arithmetic number, because the mean of its divisors is an integer number (10622430).

Almost surely, 2^42454739 is an apocalyptic number.

42454739 is a deficient number, since it is larger than the sum of its proper divisors (34981).

42454739 is a wasteful number, since it uses less digits than its factorization.

42454739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34980.

The product of its digits is 120960, while the sum is 38.

The square root of 42454739 is about 6515.7301202551. The cubic root of 42454739 is about 348.8526757543.

The spelling of 42454739 in words is "forty-two million, four hundred fifty-four thousand, seven hundred thirty-nine".