755120621 has 2 divisors, whose sum is σ = 755120622. Its totient is φ = 755120620.

The previous prime is 755120617. The next prime is 755120669. The reversal of 755120621 is 126021557.

755120621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 719848900 + 35271721 = 26830^2 + 5939^2 .

It is a cyclic number.

It is not a de Polignac number, because 755120621 - 2² = 755120617 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (755020621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 377560310 + 377560311.

It is an arithmetic number, because the mean of its divisors is an integer number (377560311).

Almost surely, 2^755120621 is an apocalyptic number.

It is an amenable number.

755120621 is a deficient number, since it is larger than the sum of its proper divisors (1).

755120621 is an equidigital number, since it uses as much as digits as its factorization.

755120621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 755120621 is about 27479.4581642361. The cubic root of 755120621 is about 910.6233385717.

The spelling of 755120621 in words is "seven hundred fifty-five million, one hundred twenty thousand, six hundred twenty-one".