42020413 has 8 divisors (see below), whose sum is σ = 44548920. Its totient is φ = 39498240.

The previous prime is 42020393. The next prime is 42020437. The reversal of 42020413 is 31402024.

It can be written as a sum of positive squares in 4 ways, for example, as 10413529 + 31606884 = 3227^2 + 5622^2 .

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 42020413 - 2¹³ = 42012221 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 (42020483) 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, 24343 + ... + 26011.

It is an arithmetic number, because the mean of its divisors is an integer number (5568615).

Almost surely, 2^42020413 is an apocalyptic number.

It is an amenable number.

42020413 is a deficient number, since it is larger than the sum of its proper divisors (2528507).

42020413 is a wasteful number, since it uses less digits than its factorization.

42020413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3167.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 42020413 is about 6482.3154042364. The cubic root of 42020413 is about 347.6589697581.

Adding to 42020413 its reverse (31402024), we get a palindrome (73422437).

The spelling of 42020413 in words is "forty-two million, twenty thousand, four hundred thirteen".