42501439 has 8 divisors (see below), whose sum is σ = 42997760. Its totient is φ = 42007896.

The previous prime is 42501421. The next prime is 42501467. The reversal of 42501439 is 93410524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 4-Lehmer number, since φ(42501439) divides (42501439-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 42501439 - 2⁷ = 42501311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42501409) by changing a digit.

It is a Zeisel number, with parameters (2, 125).

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47692 + ... + 48574.

It is an arithmetic number, because the mean of its divisors is an integer number (5374720).

Almost surely, 2^42501439 is an apocalyptic number.

42501439 is a deficient number, since it is larger than the sum of its proper divisors (496321).

42501439 is a wasteful number, since it uses less digits than its factorization.

42501439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 42501439 is about 6519.3127705303. The cubic root of 42501439 is about 348.9805409467.

The spelling of 42501439 in words is "forty-two million, five hundred one thousand, four hundred thirty-nine".