722881 has 2 divisors, whose sum is σ = 722882. Its totient is φ = 722880.

The previous prime is 722849. The next prime is 722899. The reversal of 722881 is 188227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 467856 + 255025 = 684^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 722881 - 2⁵ = 722849 is a prime.

It is a super-2 number, since 2×722881² = 1045113880322, which contains 22 as substring.

It is equal to p₅₈₂₄₉ and since 722881 and 58249 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (722581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361440 + 361441.

It is an arithmetic number, because the mean of its divisors is an integer number (361441).

2⁷²²⁸⁸¹ is an apocalyptic number.

It is an amenable number.

722881 is a deficient number, since it is larger than the sum of its proper divisors (1).

722881 is an equidigital number, since it uses as much as digits as its factorization.

722881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1792, while the sum is 28.

The square root of 722881 is about 850.2240881085. The cubic root of 722881 is about 89.7474814562.

The spelling of 722881 in words is "seven hundred twenty-two thousand, eight hundred eighty-one".