42391573 has 16 divisors (see below), whose sum is σ = 49735296. Its totient is φ = 35380800.

The previous prime is 42391571. The next prime is 42391579. The reversal of 42391573 is 37519324.

It is not a de Polignac number, because 42391573 - 2¹ = 42391571 is a prime.

It is a super-2 number, since 2×42391573² = 3594090922828658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42391571) 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 15 ways as a sum of consecutive naturals, for example, 60123 + ... + 60823.

It is an arithmetic number, because the mean of its divisors is an integer number (3108456).

Almost surely, 2^42391573 is an apocalyptic number.

It is an amenable number.

42391573 is a deficient number, since it is larger than the sum of its proper divisors (7343723).

42391573 is a wasteful number, since it uses less digits than its factorization.

42391573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924.

The product of its digits is 22680, while the sum is 34.

The square root of 42391573 is about 6510.8811231660. The cubic root of 42391573 is about 348.6795771698.

The spelling of 42391573 in words is "forty-two million, three hundred ninety-one thousand, five hundred seventy-three".