42919751 has 4 divisors (see below), whose sum is σ = 49051152. Its totient is φ = 36788352.

The previous prime is 42919729. The next prime is 42919753. The reversal of 42919751 is 15791924.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42919751 - 2²² = 38725447 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42919753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3065690 + ... + 3065703.

It is an arithmetic number, because the mean of its divisors is an integer number (12262788).

Almost surely, 2^42919751 is an apocalyptic number.

42919751 is a deficient number, since it is larger than the sum of its proper divisors (6131401).

42919751 is an equidigital number, since it uses as much as digits as its factorization.

42919751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6131400.

The product of its digits is 22680, while the sum is 38.

The square root of 42919751 is about 6551.3167378780. The cubic root of 42919751 is about 350.1217290866.

The spelling of 42919751 in words is "forty-two million, nine hundred nineteen thousand, seven hundred fifty-one".