42739407 has 20 divisors (see below), whose sum is σ = 64033200. Its totient is φ = 28409184.

The previous prime is 42739399. The next prime is 42739409. The reversal of 42739407 is 70493724.

42739407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42739407 - 2³ = 42739399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42739409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 40219 + ... + 41267.

It is an arithmetic number, because the mean of its divisors is an integer number (3201660).

Almost surely, 2^42739407 is an apocalyptic number.

42739407 is a deficient number, since it is larger than the sum of its proper divisors (21293793).

42739407 is a wasteful number, since it uses less digits than its factorization.

42739407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564 (or 1555 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 42739407 is about 6537.5382981670. The cubic root of 42739407 is about 349.6306498227.

The spelling of 42739407 in words is "forty-two million, seven hundred thirty-nine thousand, four hundred seven".