770128121 has 16 divisors (see below), whose sum is σ = 942182400. Its totient is φ = 614761488.

The previous prime is 770128087. The next prime is 770128141. The reversal of 770128121 is 121821077.

It is a cyclic number.

It is not a de Polignac number, because 770128121 - 2¹⁰ = 770127097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (770128141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41225 + ... + 56918.

It is an arithmetic number, because the mean of its divisors is an integer number (58886400).

Almost surely, 2^770128121 is an apocalyptic number.

It is an amenable number.

770128121 is a deficient number, since it is larger than the sum of its proper divisors (172054279).

770128121 is a wasteful number, since it uses less digits than its factorization.

770128121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98228.

The product of its (nonzero) digits is 1568, while the sum is 29.

The square root of 770128121 is about 27751.1823351727. The cubic root of 770128121 is about 916.6164786774.

Adding to 770128121 its reverse (121821077), we get a palindrome (891949198).

The spelling of 770128121 in words is "seven hundred seventy million, one hundred twenty-eight thousand, one hundred twenty-one".