2156122 has 8 divisors (see below), whose sum is σ = 3244500. Its totient is φ = 1074624.

The previous prime is 2156117. The next prime is 2156123. The reversal of 2156122 is 2216512.

It can be written as a sum of positive squares in 2 ways, for example, as 1874161 + 281961 = 1369^2 + 531^2 .

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2156122.

It is not an unprimeable number, because it can be changed into a prime (2156123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 847 + ... + 2242.

2^2156122 is an apocalyptic number.

2156122 is a deficient number, since it is larger than the sum of its proper divisors (1088378).

2156122 is a wasteful number, since it uses less digits than its factorization.

2156122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440.

The product of its digits is 240, while the sum is 19.

The square root of 2156122 is about 1468.3739305776. The cubic root of 2156122 is about 129.1886748948.

It can be divided in two parts, 2156 and 122, that added together give a triangular number (2278 = T₆₇).

The spelling of 2156122 in words is "two million, one hundred fifty-six thousand, one hundred twenty-two".