1264801357 has 2 divisors, whose sum is σ = 1264801358. Its totient is φ = 1264801356.

The previous prime is 1264801337. The next prime is 1264801397. The reversal of 1264801357 is 7531084621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1097331876 + 167469481 = 33126^2 + 12941^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1264801357 is a prime.

It is a super-3 number, since 3×1264801357³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264801327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632400678 + 632400679.

It is an arithmetic number, because the mean of its divisors is an integer number (632400679).

Almost surely, 2^1264801357 is an apocalyptic number.

It is an amenable number.

1264801357 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264801357 is an equidigital number, since it uses as much as digits as its factorization.

1264801357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 1264801357 is about 35564.0458468943. The cubic root of 1264801357 is about 1081.4524801419.

Adding to 1264801357 its reverse (7531084621), we get a palindrome (8795885978).

The spelling of 1264801357 in words is "one billion, two hundred sixty-four million, eight hundred one thousand, three hundred fifty-seven".