413641721 has 4 divisors (see below), whose sum is σ = 413772132. Its totient is φ = 413511312.

The previous prime is 413641693. The next prime is 413641751. The reversal of 413641721 is 127146314.

It is a happy number.

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 308353600 + 105288121 = 17560^2 + 10261^2 .

It is a cyclic number.

It is not a de Polignac number, because 413641721 - 2²² = 409447417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (413641751) 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, 60326 + ... + 66831.

It is an arithmetic number, because the mean of its divisors is an integer number (103443033).

Almost surely, 2^413641721 is an apocalyptic number.

It is an amenable number.

413641721 is a deficient number, since it is larger than the sum of its proper divisors (130411).

413641721 is a wasteful number, since it uses less digits than its factorization.

413641721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130410.

The product of its digits is 4032, while the sum is 29.

The square root of 413641721 is about 20338.1838176372. The cubic root of 413641721 is about 745.0889319237.

The spelling of 413641721 in words is "four hundred thirteen million, six hundred forty-one thousand, seven hundred twenty-one".