1356606405 has 72 divisors (see below), whose sum is σ = 2984084064. Its totient is φ = 563774400.

The previous prime is 1356606397. The next prime is 1356606413. The reversal of 1356606405 is 5046066531.

1356606405 is a `hidden beast` number, since 1 + 3 + 5 + 6 + 6 + 0 + 640 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1356606397) and next prime (1356606413).

It is not a de Polignac number, because 1356606405 - 2³ = 1356606397 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1356606405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3711 + ... + 52220.

It is an arithmetic number, because the mean of its divisors is an integer number (41445612).

Almost surely, 2^1356606405 is an apocalyptic number.

1356606405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1356606405 is an abundant number, since it is smaller than the sum of its proper divisors (1627477659).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1356606405 is a wasteful number, since it uses less digits than its factorization.

1356606405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55967 (or 55957 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 1356606405 is about 36832.1382083636. The cubic root of 1356606405 is about 1107.0093466993.

The spelling of 1356606405 in words is "one billion, three hundred fifty-six million, six hundred six thousand, four hundred five".