1655151 has 4 divisors (see below), whose sum is σ = 2206872. Its totient is φ = 1103432.

The previous prime is 1655141. The next prime is 1655153. The reversal of 1655151 is 1515561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1515561 = 3 ⋅505187.

It is a cyclic number.

It is not a de Polignac number, because 1655151 - 2⁷ = 1655023 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275856 + ... + 275861.

It is an arithmetic number, because the mean of its divisors is an integer number (551718).

2^1655151 is an apocalyptic number.

1655151 is a deficient number, since it is larger than the sum of its proper divisors (551721).

1655151 is an equidigital number, since it uses as much as digits as its factorization.

1655151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551720.

The product of its digits is 750, while the sum is 24.

The square root of 1655151 is about 1286.5267195049. The cubic root of 1655151 is about 118.2894121644.

The spelling of 1655151 in words is "one million, six hundred fifty-five thousand, one hundred fifty-one".