1355623 has 2 divisors, whose sum is σ = 1355624. Its totient is φ = 1355622.

The previous prime is 1355609. The next prime is 1355647. The reversal of 1355623 is 3265531.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1355623 - 2⁵ = 1355591 is a prime.

1355623 is a lucky number.

It is equal to p₁₀₃₉₄₈ and since 1355623 and 103948 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1355693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677811 + 677812.

It is an arithmetic number, because the mean of its divisors is an integer number (677812).

2^1355623 is an apocalyptic number.

1355623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355623 is an equidigital number, since it uses as much as digits as its factorization.

1355623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 25.

The square root of 1355623 is about 1164.3122433437. The cubic root of 1355623 is about 110.6741791403.

The spelling of 1355623 in words is "one million, three hundred fifty-five thousand, six hundred twenty-three".