750649 has 4 divisors (see below), whose sum is σ = 752500. Its totient is φ = 748800.

The previous prime is 750641. The next prime is 750653. The reversal of 750649 is 946057.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 946057 = 7 ⋅135151.

It can be written as a sum of positive squares in 2 ways, for example, as 480249 + 270400 = 693^2 + 520^2 .

It is a cyclic number.

It is not a de Polignac number, because 750649 - 2³ = 750641 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 750649.

It is not an unprimeable number, because it can be changed into a prime (750641) 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 in 3 ways as a sum of consecutive naturals, for example, 24 + ... + 1225.

It is an arithmetic number, because the mean of its divisors is an integer number (188125).

2⁷⁵⁰⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

750649 is a deficient number, since it is larger than the sum of its proper divisors (1851).

750649 is a wasteful number, since it uses less digits than its factorization.

750649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 750649 is about 866.4000230840. The cubic root of 750649 is about 90.8822290030.

It can be divided in two parts, 75064 and 9, that multiplied together give a palindrome (675576).

The spelling of 750649 in words is "seven hundred fifty thousand, six hundred forty-nine".