1405905145 has 16 divisors (see below), whose sum is σ = 1701489600. Its totient is φ = 1115150400.

The previous prime is 1405905131. The next prime is 1405905197. The reversal of 1405905145 is 5415095041.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1405905145 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1405905145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 513430 + ... + 516160.

It is an arithmetic number, because the mean of its divisors is an integer number (106343100).

Almost surely, 2^1405905145 is an apocalyptic number.

It is an amenable number.

1405905145 is a deficient number, since it is larger than the sum of its proper divisors (295584455).

1405905145 is a wasteful number, since it uses less digits than its factorization.

1405905145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3576.

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 1405905145 is about 37495.4016514025. The cubic root of 1405905145 is about 1120.2595978286.

The spelling of 1405905145 in words is "one billion, four hundred five million, nine hundred five thousand, one hundred forty-five".