2159722 has 4 divisors (see below), whose sum is σ = 3239586. Its totient is φ = 1079860.

The previous prime is 2159719. The next prime is 2159767. The reversal of 2159722 is 2279512.

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., 1347921 + 811801 = 1161^2 + 901^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539929 + ... + 539932.

2^2159722 is an apocalyptic number.

2159722 is a deficient number, since it is larger than the sum of its proper divisors (1079864).

2159722 is a wasteful number, since it uses less digits than its factorization.

2159722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079863.

The product of its digits is 2520, while the sum is 28.

The square root of 2159722 is about 1469.5992651060. The cubic root of 2159722 is about 129.2605354895.

The spelling of 2159722 in words is "two million, one hundred fifty-nine thousand, seven hundred twenty-two".