2156426 has 8 divisors (see below), whose sum is σ = 3242244. Its totient is φ = 1075680.

The previous prime is 2156417. The next prime is 2156437. The reversal of 2156426 is 6246512.

It can be written as a sum of positive squares in 2 ways, for example, as 2146225 + 10201 = 1465^2 + 101^2 .

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

It is a d-powerful number, because it can be written as 2¹³ + 1 + 5⁵ + 6⁴ + 4 + 2²¹ + 6⁶ .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2156395 and 2156404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86 + ... + 2078.

2^2156426 is an apocalyptic number.

2156426 is a deficient number, since it is larger than the sum of its proper divisors (1085818).

2156426 is a wasteful number, since it uses less digits than its factorization.

2156426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536.

The product of its digits is 2880, while the sum is 26.

The square root of 2156426 is about 1468.4774427958. The cubic root of 2156426 is about 129.1947462135.

The spelling of 2156426 in words is "two million, one hundred fifty-six thousand, four hundred twenty-six".