42087505 has 8 divisors (see below), whose sum is σ = 50760000. Its totient is φ = 33500016.

The previous prime is 42087503. The next prime is 42087509. The reversal of 42087505 is 50578024.

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

It is a cyclic number.

It is not a de Polignac number, because 42087505 - 2¹ = 42087503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42087503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20155 + ... + 22144.

It is an arithmetic number, because the mean of its divisors is an integer number (6345000).

Almost surely, 2^42087505 is an apocalyptic number.

It is an amenable number.

42087505 is a deficient number, since it is larger than the sum of its proper divisors (8672495).

42087505 is a wasteful number, since it uses less digits than its factorization.

42087505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42503.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 42087505 is about 6487.4883429568. The cubic root of 42087505 is about 347.8439015638.

The spelling of 42087505 in words is "forty-two million, eighty-seven thousand, five hundred five".