1355409 has 12 divisors (see below), whose sum is σ = 2135952. Its totient is φ = 821400.

The previous prime is 1355401. The next prime is 1355423. The reversal of 1355409 is 9045531.

It is not a de Polignac number, because 1355409 - 2³ = 1355401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1355401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6747 + ... + 6944.

It is an arithmetic number, because the mean of its divisors is an integer number (177996).

2^1355409 is an apocalyptic number.

It is an amenable number.

1355409 is a deficient number, since it is larger than the sum of its proper divisors (780543).

1355409 is a wasteful number, since it uses less digits than its factorization.

1355409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13708 (or 13705 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 1355409 is about 1164.2203399701. The cubic root of 1355409 is about 110.6683551217.

It can be divided in two parts, 1355 and 409, that added together give a square (1764 = 42²).

The spelling of 1355409 in words is "one million, three hundred fifty-five thousand, four hundred nine".