2156274 has 32 divisors (see below), whose sum is σ = 4866240. Its totient is φ = 707616.

The previous prime is 2156269. The next prime is 2156279. The reversal of 2156274 is 4726512.

2156274 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2156269) and next prime (2156279).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2156279) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3669 + ... + 4215.

It is an arithmetic number, because the mean of its divisors is an integer number (152070).

2^2156274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2156274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2433120).

2156274 is an abundant number, since it is smaller than the sum of its proper divisors (2709966).

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

2156274 is a wasteful number, since it uses less digits than its factorization.

2156274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 625 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 2156274 is about 1468.4256875988. The cubic root of 2156274 is about 129.1917106255.

The spelling of 2156274 in words is "two million, one hundred fifty-six thousand, two hundred seventy-four".