2157802 has 8 divisors (see below), whose sum is σ = 3285216. Its totient is φ = 1062732.

The previous prime is 2157797. The next prime is 2157821. The reversal of 2157802 is 2087512.

2157802 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 a super-2 number, since 2×2157802² = 9312218942408, which contains 22 as substring.

It is an unprimeable number.

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, 7918 + ... + 8185.

It is an arithmetic number, because the mean of its divisors is an integer number (410652).

2^2157802 is an apocalyptic number.

2157802 is a deficient number, since it is larger than the sum of its proper divisors (1127414).

2157802 is a wasteful number, since it uses less digits than its factorization.

2157802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16172.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 2157802 is about 1468.9458805552. The cubic root of 2157802 is about 129.2222197852. Note that the first 4 decimals are identical.

The spelling of 2157802 in words is "two million, one hundred fifty-seven thousand, eight hundred two".