755681 has 2 divisors, whose sum is σ = 755682. Its totient is φ = 755680.

The previous prime is 755663. The next prime is 755707. The reversal of 755681 is 186557.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 707281 + 48400 = 841^2 + 220^2 .

It is a cyclic number.

It is not a de Polignac number, because 755681 - 2⁶ = 755617 is a prime.

It is a super-2 number, since 2×755681² = 1142107547522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (755081) by changing a digit.

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, 377840 + 377841.

It is an arithmetic number, because the mean of its divisors is an integer number (377841).

2⁷⁵⁵⁶⁸¹ is an apocalyptic number.

It is an amenable number.

755681 is a deficient number, since it is larger than the sum of its proper divisors (1).

755681 is an equidigital number, since it uses as much as digits as its factorization.

755681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 32.

The square root of 755681 is about 869.2991429882. The cubic root of 755681 is about 91.0848542335.

The spelling of 755681 in words is "seven hundred fifty-five thousand, six hundred eighty-one".