42664615 has 8 divisors (see below), whose sum is σ = 58511520. Its totient is φ = 29255712.

The previous prime is 42664603. The next prime is 42664651. The reversal of 42664615 is 51646624.

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 42664615 - 2¹³ = 42656423 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 609460 + ... + 609529.

It is an arithmetic number, because the mean of its divisors is an integer number (7313940).

Almost surely, 2^42664615 is an apocalyptic number.

42664615 is a deficient number, since it is larger than the sum of its proper divisors (15846905).

42664615 is a wasteful number, since it uses less digits than its factorization.

42664615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219001.

The product of its digits is 34560, while the sum is 34.

The square root of 42664615 is about 6531.8155975196. The cubic root of 42664615 is about 349.4265848800.

Subtracting 42664615 from its reverse (51646624), we obtain a square (8982009 = 2997²).

The spelling of 42664615 in words is "forty-two million, six hundred sixty-four thousand, six hundred fifteen".