405421611 has 16 divisors (see below), whose sum is σ = 624729600. Its totient is φ = 229065408.

The previous prime is 405421607. The next prime is 405421619. The reversal of 405421611 is 116124504.

It is a happy number.

It is not a de Polignac number, because 405421611 - 2² = 405421607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405421619) 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, 106591 + ... + 110328.

It is an arithmetic number, because the mean of its divisors is an integer number (39045600).

Almost surely, 2^405421611 is an apocalyptic number.

405421611 is a deficient number, since it is larger than the sum of its proper divisors (219307989).

405421611 is a wasteful number, since it uses less digits than its factorization.

405421611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217018.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 405421611 is about 20135.0840822679. The cubic root of 405421611 is about 740.1202695924.

The spelling of 405421611 in words is "four hundred five million, four hundred twenty-one thousand, six hundred eleven".