2180746 has 4 divisors (see below), whose sum is σ = 3271122. Its totient is φ = 1090372.

The previous prime is 2180741. The next prime is 2180747. The reversal of 2180746 is 6470812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2134521 + 46225 = 1461^2 + 215^2 .

It is not an unprimeable number, because it can be changed into a prime (2180741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545185 + ... + 545188.

2^2180746 is an apocalyptic number.

2180746 is a deficient number, since it is larger than the sum of its proper divisors (1090376).

2180746 is a wasteful number, since it uses less digits than its factorization.

2180746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090375.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 2180746 is about 1476.7349118918. The cubic root of 2180746 is about 129.6786144103.

It can be divided in two parts, 2180 and 746, that added together give a triangular number (2926 = T₇₆).

The spelling of 2180746 in words is "two million, one hundred eighty thousand, seven hundred forty-six".