755649 has 20 divisors (see below), whose sum is σ = 1190640. Its totient is φ = 476280.

The previous prime is 755627. The next prime is 755663. The reversal of 755649 is 946557.

755649 is a `hidden beast` number, since 7 + 5 + 5 + 649 = 666.

755649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 755649 - 2⁵ = 755617 is a prime.

It is a super-2 number, since 2×755649² = 1142010822402, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 755649.

It is not an unprimeable number, because it can be changed into a prime (755449) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1294 + ... + 1784.

It is an arithmetic number, because the mean of its divisors is an integer number (59532).

2⁷⁵⁵⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

755649 is a deficient number, since it is larger than the sum of its proper divisors (434991).

755649 is a wasteful number, since it uses less digits than its factorization.

755649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522 (or 513 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 755649 is about 869.2807371615. The cubic root of 755649 is about 91.0835685250.

The spelling of 755649 in words is "seven hundred fifty-five thousand, six hundred forty-nine".