1556722 has 4 divisors (see below), whose sum is σ = 2335086. Its totient is φ = 778360.

The previous prime is 1556719. The next prime is 1556747. The reversal of 1556722 is 2276551.

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., 1540081 + 16641 = 1241^2 + 129^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 389179 + ... + 389182.

2^1556722 is an apocalyptic number.

1556722 is a deficient number, since it is larger than the sum of its proper divisors (778364).

1556722 is an equidigital number, since it uses as much as digits as its factorization.

1556722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778363.

The product of its digits is 4200, while the sum is 28.

The square root of 1556722 is about 1247.6866593821. The cubic root of 1556722 is about 115.8965089648.

It can be divided in two parts, 1556 and 722, that added together give a triangular number (2278 = T₆₇).

The spelling of 1556722 in words is "one million, five hundred fifty-six thousand, seven hundred twenty-two".