2156694 has 8 divisors (see below), whose sum is σ = 4313400. Its totient is φ = 718896.

The previous prime is 2156683. The next prime is 2156699. The reversal of 2156694 is 4966512.

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

2156694 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156699) 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, 179719 + ... + 179730.

It is an arithmetic number, because the mean of its divisors is an integer number (539175).

2^2156694 is an apocalyptic number.

2156694 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2156694 is a wasteful number, since it uses less digits than its factorization.

2156694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359454.

The product of its digits is 12960, while the sum is 33.

The square root of 2156694 is about 1468.5686909369. The cubic root of 2156694 is about 129.2000980871.

It can be divided in two parts, 2156 and 694, that added together give a triangular number (2850 = T₇₅).

The spelling of 2156694 in words is "two million, one hundred fifty-six thousand, six hundred ninety-four".