1555135 has 4 divisors (see below), whose sum is σ = 1866168. Its totient is φ = 1244104.

The previous prime is 1555133. The next prime is 1555153. The reversal of 1555135 is 5315551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1555135 - 2¹ = 1555133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155509 + ... + 155518.

It is an arithmetic number, because the mean of its divisors is an integer number (466542).

2^1555135 is an apocalyptic number.

1555135 is a deficient number, since it is larger than the sum of its proper divisors (311033).

1555135 is an equidigital number, since it uses as much as digits as its factorization.

1555135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311032.

The product of its digits is 1875, while the sum is 25.

The square root of 1555135 is about 1247.0505202276. The cubic root of 1555135 is about 115.8571120147.

The spelling of 1555135 in words is "one million, five hundred fifty-five thousand, one hundred thirty-five".