1264128601 has 2 divisors, whose sum is σ = 1264128602. Its totient is φ = 1264128600.

The previous prime is 1264128587. The next prime is 1264128623. The reversal of 1264128601 is 1068214621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 703575625 + 560552976 = 26525^2 + 23676^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264128601 - 2¹¹ = 1264126553 is a prime.

It is a super-2 number, since 2×1264128601² = 3196042239732434402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1264128661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632064300 + 632064301.

It is an arithmetic number, because the mean of its divisors is an integer number (632064301).

Almost surely, 2^1264128601 is an apocalyptic number.

It is an amenable number.

1264128601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264128601 is an equidigital number, since it uses as much as digits as its factorization.

1264128601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1264128601 is about 35554.5862161269. The cubic root of 1264128601 is about 1081.2607022853.

The spelling of 1264128601 in words is "one billion, two hundred sixty-four million, one hundred twenty-eight thousand, six hundred one".