1356005 has 32 divisors (see below), whose sum is σ = 2052864. Its totient is φ = 838656.

The previous prime is 1355999. The next prime is 1356007. The reversal of 1356005 is 5006531.

1356005 = T₁₀₄ + T₁₀₅ + ... + T₂₀₉.

It is not a de Polignac number, because 1356005 - 2⁴ = 1355989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25559 + ... + 25611.

It is an arithmetic number, because the mean of its divisors is an integer number (64152).

2^1356005 is an apocalyptic number.

It is an amenable number.

1356005 is a deficient number, since it is larger than the sum of its proper divisors (696859).

1356005 is a wasteful number, since it uses less digits than its factorization.

1356005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 1356005 is about 1164.4762771306. The cubic root of 1356005 is about 110.6845737623.

The spelling of 1356005 in words is "one million, three hundred fifty-six thousand, five".