1553135 has 4 divisors (see below), whose sum is σ = 1863768. Its totient is φ = 1242504.

The previous prime is 1553129. The next prime is 1553147. The reversal of 1553135 is 5313551.

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 1553135 - 2⁴ = 1553119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1553135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155309 + ... + 155318.

It is an arithmetic number, because the mean of its divisors is an integer number (465942).

2^1553135 is an apocalyptic number.

1553135 is a deficient number, since it is larger than the sum of its proper divisors (310633).

1553135 is an equidigital number, since it uses as much as digits as its factorization.

1553135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310632.

The product of its digits is 1125, while the sum is 23.

The square root of 1553135 is about 1246.2483701093. The cubic root of 1553135 is about 115.8074242324.

Adding to 1553135 its reverse (5313551), we get a palindrome (6866686).

The spelling of 1553135 in words is "one million, five hundred fifty-three thousand, one hundred thirty-five".