42507399 has 8 divisors (see below), whose sum is σ = 61828992. Its totient is φ = 25762040.

The previous prime is 42507397. The next prime is 42507407. The reversal of 42507399 is 99370524.

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 42507399 - 2¹ = 42507397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42507391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 644019 + ... + 644084.

It is an arithmetic number, because the mean of its divisors is an integer number (7728624).

Almost surely, 2^42507399 is an apocalyptic number.

42507399 is a deficient number, since it is larger than the sum of its proper divisors (19321593).

42507399 is a wasteful number, since it uses less digits than its factorization.

42507399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288117.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 42507399 is about 6519.7698579014. The cubic root of 42507399 is about 348.9968527616.

The spelling of 42507399 in words is "forty-two million, five hundred seven thousand, three hundred ninety-nine".