722156 has 6 divisors (see below), whose sum is σ = 1263780. Its totient is φ = 361076.

The previous prime is 722153. The next prime is 722159. The reversal of 722156 is 651227.

It is an interprime number because it is at equal distance from previous prime (722153) and next prime (722159).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 722156.

It is not an unprimeable number, because it can be changed into a prime (722153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90266 + ... + 90273.

It is an arithmetic number, because the mean of its divisors is an integer number (210630).

2⁷²²¹⁵⁶ is an apocalyptic number.

It is an amenable number.

722156 is a deficient number, since it is larger than the sum of its proper divisors (541624).

722156 is a wasteful number, since it uses less digits than its factorization.

722156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180543 (or 180541 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 722156 is about 849.7976229668. The cubic root of 722156 is about 89.7174678999.

It can be divided in two parts, 722 and 156, that added together give a palindrome (878).

The spelling of 722156 in words is "seven hundred twenty-two thousand, one hundred fifty-six".