1264140377 has 2 divisors, whose sum is σ = 1264140378. Its totient is φ = 1264140376.

The previous prime is 1264140373. The next prime is 1264140391. The reversal of 1264140377 is 7730414621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1254505561 + 9634816 = 35419^2 + 3104^2 .

It is an emirp because it is prime and its reverse (7730414621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1264140377 - 2² = 1264140373 is a prime.

It is not a weakly prime, because it can be changed into another prime (1264140373) 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 as a sum of consecutive naturals, namely, 632070188 + 632070189.

It is an arithmetic number, because the mean of its divisors is an integer number (632070189).

Almost surely, 2^1264140377 is an apocalyptic number.

It is an amenable number.

1264140377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264140377 is an equidigital number, since it uses as much as digits as its factorization.

1264140377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 1264140377 is about 35554.7518202560. The cubic root of 1264140377 is about 1081.2640597724.

Adding to 1264140377 its reverse (7730414621), we get a palindrome (8994554998).

The spelling of 1264140377 in words is "one billion, two hundred sixty-four million, one hundred forty thousand, three hundred seventy-seven".