2157270 has 16 divisors (see below), whose sum is σ = 5177520. Its totient is φ = 575264.

The previous prime is 2157269. The next prime is 2157277. The reversal of 2157270 is 727512.

2157270 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2157270.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157277) 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 7 ways as a sum of consecutive naturals, for example, 35925 + ... + 35984.

It is an arithmetic number, because the mean of its divisors is an integer number (323595).

2^2157270 is an apocalyptic number.

2157270 is an abundant number, since it is smaller than the sum of its proper divisors (3020250).

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

2157270 is a wasteful number, since it uses less digits than its factorization.

2157270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71919.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 2157270 is about 1468.7647871596. The cubic root of 2157270 is about 129.2115991209.

It can be divided in two parts, 21 and 57270, that added together give a triangular number (57291 = T₃₃₈).

The spelling of 2157270 in words is "two million, one hundred fifty-seven thousand, two hundred seventy".