42719591 has 4 divisors (see below), whose sum is σ = 42829800. Its totient is φ = 42609384.

The previous prime is 42719557. The next prime is 42719609. The reversal of 42719591 is 19591724.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42719591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42719491) 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, 54521 + ... + 55298.

It is an arithmetic number, because the mean of its divisors is an integer number (10707450).

Almost surely, 2^42719591 is an apocalyptic number.

42719591 is a deficient number, since it is larger than the sum of its proper divisors (110209).

42719591 is a wasteful number, since it uses less digits than its factorization.

42719591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110208.

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

The square root of 42719591 is about 6536.0225672805. The cubic root of 42719591 is about 349.5766063963.

The spelling of 42719591 in words is "forty-two million, seven hundred nineteen thousand, five hundred ninety-one".