2145755 has 8 divisors (see below), whose sum is σ = 2590224. Its totient is φ = 1706400.

The previous prime is 2145721. The next prime is 2145763. The reversal of 2145755 is 5575412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2145755 - 2¹⁰ = 2144731 is a prime.

It is a d-powerful number, because it can be written as 2²¹ + 1 + 4⁷ + 5⁴ + 7³ + 5⁶ + 5⁶ .

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 281 + ... + 2090.

It is an arithmetic number, because the mean of its divisors is an integer number (323778).

2^2145755 is an apocalyptic number.

2145755 is a deficient number, since it is larger than the sum of its proper divisors (444469).

2145755 is a wasteful number, since it uses less digits than its factorization.

2145755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557.

The product of its digits is 7000, while the sum is 29.

The square root of 2145755 is about 1464.8395816607. The cubic root of 2145755 is about 128.9812884744.

It can be divided in two parts, 21457 and 55, that added together give a palindrome (21512).

The spelling of 2145755 in words is "two million, one hundred forty-five thousand, seven hundred fifty-five".