1264005276 has 24 divisors (see below), whose sum is σ = 2950466064. Its totient is φ = 421175040.

The previous prime is 1264005271. The next prime is 1264005283. The reversal of 1264005276 is 6725004621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264005271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15406 + ... + 52586.

It is an arithmetic number, because the mean of its divisors is an integer number (122936086).

Almost surely, 2^1264005276 is an apocalyptic number.

It is an amenable number.

1264005276 is an abundant number, since it is smaller than the sum of its proper divisors (1686460788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1264005276 is a wasteful number, since it uses less digits than its factorization.

1264005276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40021 (or 40019 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 1264005276 is about 35552.8518687320. The cubic root of 1264005276 is about 1081.2255395092.

Adding to 1264005276 its reverse (6725004621), we get a palindrome (7989009897).

The spelling of 1264005276 in words is "one billion, two hundred sixty-four million, five thousand, two hundred seventy-six".