2157117 has 8 divisors (see below), whose sum is σ = 2884224. Its totient is φ = 1434048.

The previous prime is 2157109. The next prime is 2157119. The reversal of 2157117 is 7117512.

It is a happy number.

2157117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2157117 - 2³ = 2157109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157119) 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 7 ways as a sum of consecutive naturals, for example, 613 + ... + 2165.

It is an arithmetic number, because the mean of its divisors is an integer number (360528).

2^2157117 is an apocalyptic number.

It is an amenable number.

2157117 is a deficient number, since it is larger than the sum of its proper divisors (727107).

2157117 is a wasteful number, since it uses less digits than its factorization.

2157117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019.

The product of its digits is 490, while the sum is 24.

The square root of 2157117 is about 1468.7127016541. The cubic root of 2157117 is about 129.2085443585.

The spelling of 2157117 in words is "two million, one hundred fifty-seven thousand, one hundred seventeen".