774145121 has 2 divisors, whose sum is σ = 774145122. Its totient is φ = 774145120.

The previous prime is 774145081. The next prime is 774145129. The reversal of 774145121 is 121541477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 773952400 + 192721 = 27820^2 + 439^2 .

It is a cyclic number.

It is not a de Polignac number, because 774145121 - 2¹⁴ = 774128737 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (774145129) 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 as a sum of consecutive naturals, namely, 387072560 + 387072561.

It is an arithmetic number, because the mean of its divisors is an integer number (387072561).

Almost surely, 2^774145121 is an apocalyptic number.

It is an amenable number.

774145121 is a deficient number, since it is larger than the sum of its proper divisors (1).

774145121 is an equidigital number, since it uses as much as digits as its factorization.

774145121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7840, while the sum is 32.

The square root of 774145121 is about 27823.4634975590. The cubic root of 774145121 is about 918.2074109340.

Adding to 774145121 its reverse (121541477), we get a palindrome (895686598).

The spelling of 774145121 in words is "seven hundred seventy-four million, one hundred forty-five thousand, one hundred twenty-one".