2156342 has 8 divisors (see below), whose sum is σ = 3375216. Its totient is φ = 1031272.

The previous prime is 2156339. The next prime is 2156351. The reversal of 2156342 is 2436512.

2156342 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 Harshad number since it is a multiple of its sum of digits (23).

It is an Ulam number.

It is a congruent number.

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, 23393 + ... + 23484.

It is an arithmetic number, because the mean of its divisors is an integer number (421902).

2^2156342 is an apocalyptic number.

2156342 is a deficient number, since it is larger than the sum of its proper divisors (1218874).

2156342 is a wasteful number, since it uses less digits than its factorization.

2156342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46902.

The product of its digits is 1440, while the sum is 23.

The square root of 2156342 is about 1468.4488414650. The cubic root of 2156342 is about 129.1930686694.

The spelling of 2156342 in words is "two million, one hundred fifty-six thousand, three hundred forty-two".