1355906 has 4 divisors (see below), whose sum is σ = 2033862. Its totient is φ = 677952.

The previous prime is 1355891. The next prime is 1355917. The reversal of 1355906 is 6095531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6095531 = 13 ⋅468887.

It can be written as a sum of positive squares in only one way, i.e., 1229881 + 126025 = 1109^2 + 355^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338975 + ... + 338978.

2^1355906 is an apocalyptic number.

1355906 is a deficient number, since it is larger than the sum of its proper divisors (677956).

1355906 is an equidigital number, since it uses as much as digits as its factorization.

1355906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677955.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 1355906 is about 1164.4337679748. The cubic root of 1355906 is about 110.6818800556.

The spelling of 1355906 in words is "one million, three hundred fifty-five thousand, nine hundred six".