1264660634 has 32 divisors (see below), whose sum is σ = 2150193600. Its totient is φ = 554238720.

The previous prime is 1264660633. The next prime is 1264660643. The reversal of 1264660634 is 4360664621.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (1264660633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21524 + ... + 54704.

It is an arithmetic number, because the mean of its divisors is an integer number (67193550).

Almost surely, 2^1264660634 is an apocalyptic number.

1264660634 is a deficient number, since it is larger than the sum of its proper divisors (885532966).

1264660634 is a wasteful number, since it uses less digits than its factorization.

1264660634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33278.

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 1264660634 is about 35562.0673471046. The cubic root of 1264660634 is about 1081.4123708443.

The spelling of 1264660634 in words is "one billion, two hundred sixty-four million, six hundred sixty thousand, six hundred thirty-four".