120644761 has 4 divisors (see below), whose sum is σ = 120707172. Its totient is φ = 120582352.

The previous prime is 120644731. The next prime is 120644773. The reversal of 120644761 is 167446021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 167446021 = 6353 ⋅26357.

It can be written as a sum of positive squares in 2 ways, for example, as 48734361 + 71910400 = 6981^2 + 8480^2 .

It is a cyclic number.

It is not a de Polignac number, because 120644761 - 2¹¹ = 120642713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120644701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28210 + ... + 32203.

It is an arithmetic number, because the mean of its divisors is an integer number (30176793).

Almost surely, 2^120644761 is an apocalyptic number.

It is an amenable number.

120644761 is a deficient number, since it is larger than the sum of its proper divisors (62411).

120644761 is an equidigital number, since it uses as much as digits as its factorization.

120644761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62410.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 120644761 is about 10983.8409038005. The cubic root of 120644761 is about 494.1242359379.

The spelling of 120644761 in words is "one hundred twenty million, six hundred forty-four thousand, seven hundred sixty-one".