1264688441 has 4 divisors (see below), whose sum is σ = 1268509584. Its totient is φ = 1260867300.

The previous prime is 1264688407. The next prime is 1264688459. The reversal of 1264688441 is 1448864621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1264688441 - 2¹⁸ = 1264426297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1264688392 and 1264688401.

It is not an unprimeable number, because it can be changed into a prime (1264688141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1910075 + ... + 1910736.

It is an arithmetic number, because the mean of its divisors is an integer number (317127396).

Almost surely, 2^1264688441 is an apocalyptic number.

It is an amenable number.

1264688441 is a deficient number, since it is larger than the sum of its proper divisors (3821143).

1264688441 is an equidigital number, since it uses as much as digits as its factorization.

1264688441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821142.

The product of its digits is 294912, while the sum is 44.

The square root of 1264688441 is about 35562.4583092901. The cubic root of 1264688441 is about 1081.4202967159.

The spelling of 1264688441 in words is "one billion, two hundred sixty-four million, six hundred eighty-eight thousand, four hundred forty-one".