405140011 has 4 divisors (see below), whose sum is σ = 406443024. Its totient is φ = 403837000.

The previous prime is 405139993. The next prime is 405140017. The reversal of 405140011 is 110041504.

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

It is a cyclic number.

It is not a de Polignac number, because 405140011 - 2¹¹ = 405137963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405140017) 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, 651040 + ... + 651661.

It is an arithmetic number, because the mean of its divisors is an integer number (101610756).

Almost surely, 2^405140011 is an apocalyptic number.

405140011 is a deficient number, since it is larger than the sum of its proper divisors (1303013).

405140011 is a wasteful number, since it uses less digits than its factorization.

405140011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303012.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 405140011 is about 20128.0900981688. The cubic root of 405140011 is about 739.9488709500.

Adding to 405140011 its reverse (110041504), we get a palindrome (515181515).

The spelling of 405140011 in words is "four hundred five million, one hundred forty thousand, eleven".