1405040605 has 16 divisors (see below), whose sum is σ = 1695665664. Its totient is φ = 1117642240.

The previous prime is 1405040551. The next prime is 1405040617. The reversal of 1405040605 is 5060405041.

It is a de Polignac number, because none of the positive numbers 2^k-1405040605 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1405040605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 759792 + ... + 761638.

It is an arithmetic number, because the mean of its divisors is an integer number (105979104).

Almost surely, 2^1405040605 is an apocalyptic number.

It is an amenable number.

1405040605 is a deficient number, since it is larger than the sum of its proper divisors (290625059).

1405040605 is a wasteful number, since it uses less digits than its factorization.

1405040605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2636.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1405040605 is about 37483.8712648520. The cubic root of 1405040605 is about 1120.0299218728.

Adding to 1405040605 its reverse (5060405041), we get a palindrome (6465445646).

The spelling of 1405040605 in words is "one billion, four hundred five million, forty thousand, six hundred five".