42506387 has 8 divisors (see below), whose sum is σ = 52995072. Its totient is φ = 33121800.

The previous prime is 42506383. The next prime is 42506411. The reversal of 42506387 is 78360524.

It is a happy number.

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 42506387 - 2² = 42506383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42506383) 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, 275939 + ... + 276092.

It is an arithmetic number, because the mean of its divisors is an integer number (6624384).

Almost surely, 2^42506387 is an apocalyptic number.

42506387 is a deficient number, since it is larger than the sum of its proper divisors (10488685).

42506387 is a wasteful number, since it uses less digits than its factorization.

42506387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552049.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 42506387 is about 6519.6922473381. The cubic root of 42506387 is about 348.9940831448.

The spelling of 42506387 in words is "forty-two million, five hundred six thousand, three hundred eighty-seven".