2145655 has 8 divisors (see below), whose sum is σ = 2726352. Its totient is φ = 1615488.

The previous prime is 2145643. The next prime is 2145677. The reversal of 2145655 is 5565412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145655 is a prime.

It is a Duffinian number.

2145655 is a lucky number.

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 7 ways as a sum of consecutive naturals, for example, 12537 + ... + 12706.

It is an arithmetic number, because the mean of its divisors is an integer number (340794).

2^2145655 is an apocalyptic number.

2145655 is a deficient number, since it is larger than the sum of its proper divisors (580697).

2145655 is a wasteful number, since it uses less digits than its factorization.

2145655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25265.

The product of its digits is 6000, while the sum is 28.

The square root of 2145655 is about 1464.8054478326. The cubic root of 2145655 is about 128.9792847773.

The spelling of 2145655 in words is "two million, one hundred forty-five thousand, six hundred fifty-five".