1264694361 has 24 divisors (see below), whose sum is σ = 1983627360. Its totient is φ = 714555072.

The previous prime is 1264694303. The next prime is 1264694363. The reversal of 1264694361 is 1634964621.

It is a happy number.

It is not a de Polignac number, because 1264694361 - 2¹¹ = 1264692313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1264694363) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35251 + ... + 61416.

It is an arithmetic number, because the mean of its divisors is an integer number (82651140).

Almost surely, 2^1264694361 is an apocalyptic number.

It is an amenable number.

1264694361 is a deficient number, since it is larger than the sum of its proper divisors (718932999).

1264694361 is an equidigital number, since it uses as much as digits as its factorization.

1264694361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96773 (or 96766 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 1264694361 is about 35562.5415430337. The cubic root of 1264694361 is about 1081.4219840876.

The spelling of 1264694361 in words is "one billion, two hundred sixty-four million, six hundred ninety-four thousand, three hundred sixty-one".