413542021 has 4 divisors (see below), whose sum is σ = 414463500. Its totient is φ = 412620544.

The previous prime is 413542009. The next prime is 413542027. The reversal of 413542021 is 120245314.

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

It can be written as a sum of positive squares in 2 ways, for example, as 104837121 + 308704900 = 10239^2 + 17570^2 .

It is a cyclic number.

It is not a de Polignac number, because 413542021 - 2¹³ = 413533829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 413541983 and 413542001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (413542027) 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, 460066 + ... + 460963.

It is an arithmetic number, because the mean of its divisors is an integer number (103615875).

Almost surely, 2^413542021 is an apocalyptic number.

It is an amenable number.

413542021 is a deficient number, since it is larger than the sum of its proper divisors (921479).

413542021 is an equidigital number, since it uses as much as digits as its factorization.

413542021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921478.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 413542021 is about 20335.7326152760. The cubic root of 413542021 is about 745.0290642235.

Adding to 413542021 its reverse (120245314), we get a palindrome (533787335).

The spelling of 413542021 in words is "four hundred thirteen million, five hundred forty-two thousand, twenty-one".