2178572 has 24 divisors (see below), whose sum is σ = 4226880. Its totient is φ = 974160.

The previous prime is 2178571. The next prime is 2178581. The reversal of 2178572 is 2758712.

Added to its reverse (2758712) it gives a square (4937284 = 2222²).

It is not an unprimeable number, because it can be changed into a prime (2178571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2579 + ... + 3317.

It is an arithmetic number, because the mean of its divisors is an integer number (176120).

2^2178572 is an apocalyptic number.

2178572 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2178572 is a deficient number, since it is larger than the sum of its proper divisors (2048308).

2178572 is a wasteful number, since it uses less digits than its factorization.

2178572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821 (or 819 counting only the distinct ones).

The product of its digits is 7840, while the sum is 32.

The square root of 2178572 is about 1475.9986449858. The cubic root of 2178572 is about 129.6355075954.

Adding to 2178572 its reverse (2758712), we get a square (4937284 = 2222²).

The spelling of 2178572 in words is "two million, one hundred seventy-eight thousand, five hundred seventy-two".