1555045 has 4 divisors (see below), whose sum is σ = 1866060. Its totient is φ = 1244032.

The previous prime is 1555039. The next prime is 1555051. The reversal of 1555045 is 5405551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5405551 = 227 ⋅23813.

It is an interprime number because it is at equal distance from previous prime (1555039) and next prime (1555051).

It can be written as a sum of positive squares in 2 ways, for example, as 567009 + 988036 = 753^2 + 994^2 .

It is a cyclic number.

It is not a de Polignac number, because 1555045 - 2⁵ = 1555013 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 155500 + ... + 155509.

It is an arithmetic number, because the mean of its divisors is an integer number (466515).

2^1555045 is an apocalyptic number.

It is an amenable number.

1555045 is a deficient number, since it is larger than the sum of its proper divisors (311015).

1555045 is an equidigital number, since it uses as much as digits as its factorization.

1555045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311014.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 1555045 is about 1247.0144345596. The cubic root of 1555045 is about 115.8548769802.

The spelling of 1555045 in words is "one million, five hundred fifty-five thousand, forty-five".