2405141721 has 16 divisors (see below), whose sum is σ = 3564299520. Its totient is φ = 1602920880.

The previous prime is 2405141699. The next prime is 2405141729. The reversal of 2405141721 is 1271415042.

2405141721 is a `hidden beast` number, since 240 + 5 + 1 + 417 + 2 + 1 = 666.

It is not a de Polignac number, because 2405141721 - 2⁵ = 2405141689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2405141729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85771 + ... + 110303.

It is an arithmetic number, because the mean of its divisors is an integer number (222768720).

Almost surely, 2^2405141721 is an apocalyptic number.

It is an amenable number.

2405141721 is a deficient number, since it is larger than the sum of its proper divisors (1159157799).

2405141721 is a wasteful number, since it uses less digits than its factorization.

2405141721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28173 (or 28167 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 2405141721 is about 49042.2442492184. The cubic root of 2405141721 is about 1339.8213396988.

Adding to 2405141721 its reverse (1271415042), we get a palindrome (3676556763).

The spelling of 2405141721 in words is "two billion, four hundred five million, one hundred forty-one thousand, seven hundred twenty-one".