42020593 has 4 divisors (see below), whose sum is σ = 43376128. Its totient is φ = 40665060.

The previous prime is 42020557. The next prime is 42020597. The reversal of 42020593 is 39502024.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42020593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42020597) 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, 677721 + ... + 677782.

It is an arithmetic number, because the mean of its divisors is an integer number (10844032).

Almost surely, 2^42020593 is an apocalyptic number.

It is an amenable number.

42020593 is a deficient number, since it is larger than the sum of its proper divisors (1355535).

42020593 is a wasteful number, since it uses less digits than its factorization.

42020593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355534.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 42020593 is about 6482.3292881494. The cubic root of 42020593 is about 347.6594661718.

Subtracting from 42020593 its reverse (39502024), we obtain a square (2518569 = 1587²).

The spelling of 42020593 in words is "forty-two million, twenty thousand, five hundred ninety-three".