42120504749 has 8 divisors (see below), whose sum is σ = 44367219840. Its totient is φ = 39876774336.

The previous prime is 42120504737. The next prime is 42120504761. The reversal of 42120504749 is 94740502124.

It is an interprime number because it is at equal distance from previous prime (42120504737) and next prime (42120504761).

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 42120504749 - 2⁸ = 42120504493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42120504709) 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, 717164 + ... + 773669.

It is an arithmetic number, because the mean of its divisors is an integer number (5545902480).

Almost surely, 2^42120504749 is an apocalyptic number.

It is an amenable number.

42120504749 is a deficient number, since it is larger than the sum of its proper divisors (2246715091).

42120504749 is a wasteful number, since it uses less digits than its factorization.

42120504749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492339.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 42120504749 in words is "forty-two billion, one hundred twenty million, five hundred four thousand, seven hundred forty-nine".