755981 has 4 divisors (see below), whose sum is σ = 760092. Its totient is φ = 751872.

The previous prime is 755977. The next prime is 756011. The reversal of 755981 is 189557.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 189557 = 131 ⋅1447.

It can be written as a sum of positive squares in 2 ways, for example, as 401956 + 354025 = 634^2 + 595^2 .

It is a cyclic number.

It is not a de Polignac number, because 755981 - 2² = 755977 is a prime.

It is a super-2 number, since 2×755981² = 1143014544722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (755081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1766 + ... + 2151.

It is an arithmetic number, because the mean of its divisors is an integer number (190023).

2⁷⁵⁵⁹⁸¹ is an apocalyptic number.

It is an amenable number.

755981 is a deficient number, since it is larger than the sum of its proper divisors (4111).

755981 is a wasteful number, since it uses less digits than its factorization.

755981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4110.

The product of its digits is 12600, while the sum is 35.

The square root of 755981 is about 869.4716786647. The cubic root of 755981 is about 91.0969059860.

The spelling of 755981 in words is "seven hundred fifty-five thousand, nine hundred eighty-one".