1351405605 has 32 divisors (see below), whose sum is σ = 2362222080. Its totient is φ = 654281280.

The previous prime is 1351405577. The next prime is 1351405621. The reversal of 1351405605 is 5065041531.

It is not a de Polignac number, because 1351405605 - 2⁶ = 1351405541 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116394 + ... + 127476.

It is an arithmetic number, because the mean of its divisors is an integer number (73819440).

Almost surely, 2^1351405605 is an apocalyptic number.

1351405605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1351405605 is a deficient number, since it is larger than the sum of its proper divisors (1010816475).

1351405605 is a wasteful number, since it uses less digits than its factorization.

1351405605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11841.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 1351405605 is about 36761.4690266861. The cubic root of 1351405605 is about 1105.5928938099.

The spelling of 1351405605 in words is "one billion, three hundred fifty-one million, four hundred five thousand, six hundred five".