2157695 has 8 divisors (see below), whose sum is σ = 2598144. Its totient is φ = 1720224.

The previous prime is 2157679. The next prime is 2157709. The reversal of 2157695 is 5967512.

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

It is a cyclic number.

It is not a de Polignac number, because 2157695 - 2⁴ = 2157679 is a prime.

It is a Duffinian 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, 1442 + ... + 2528.

It is an arithmetic number, because the mean of its divisors is an integer number (324768).

2^2157695 is an apocalyptic number.

2157695 is a deficient number, since it is larger than the sum of its proper divisors (440449).

2157695 is a wasteful number, since it uses less digits than its factorization.

2157695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489.

The product of its digits is 18900, while the sum is 35.

The square root of 2157695 is about 1468.9094594290. The cubic root of 2157695 is about 129.2200838144.

The spelling of 2157695 in words is "two million, one hundred fifty-seven thousand, six hundred ninety-five".