1264661701 has 2 divisors, whose sum is σ = 1264661702. Its totient is φ = 1264661700.

The previous prime is 1264661689. The next prime is 1264661711. The reversal of 1264661701 is 1071664621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1019269476 + 245392225 = 31926^2 + 15665^2 .

It is an emirp because it is prime and its reverse (1071664621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1264661701 - 2⁵ = 1264661669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264661711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632330850 + 632330851.

It is an arithmetic number, because the mean of its divisors is an integer number (632330851).

Almost surely, 2^1264661701 is an apocalyptic number.

It is an amenable number.

1264661701 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264661701 is an equidigital number, since it uses as much as digits as its factorization.

1264661701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 1264661701 is about 35562.0823490414. The cubic root of 1264661701 is about 1081.4126749751.

It can be divided in two parts, 12646 and 61701, that added together give a palindrome (74347).

The spelling of 1264661701 in words is "one billion, two hundred sixty-four million, six hundred sixty-one thousand, seven hundred one".