1655155 has 4 divisors (see below), whose sum is σ = 1986192. Its totient is φ = 1324120.

The previous prime is 1655153. The next prime is 1655167. The reversal of 1655155 is 5515561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5515561 = 23 ⋅239807.

It is not a de Polignac number, because 1655155 - 2¹ = 1655153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1655153) 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, 165511 + ... + 165520.

It is an arithmetic number, because the mean of its divisors is an integer number (496548).

2^1655155 is an apocalyptic number.

1655155 is a deficient number, since it is larger than the sum of its proper divisors (331037).

1655155 is an equidigital number, since it uses as much as digits as its factorization.

1655155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331036.

The product of its digits is 3750, while the sum is 28.

The square root of 1655155 is about 1286.5282740772. The cubic root of 1655155 is about 118.2895074542.

The spelling of 1655155 in words is "one million, six hundred fifty-five thousand, one hundred fifty-five".