1264565340 has 72 divisors (see below), whose sum is σ = 3838751280. Its totient is φ = 336962304.

The previous prime is 1264565339. The next prime is 1264565347. The reversal of 1264565340 is 435654621.

1264565340 is a `hidden beast` number, since 1 + 2 + 64 + 565 + 34 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1264565295 and 1264565304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264565347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 441192 + ... + 444048.

It is an arithmetic number, because the mean of its divisors is an integer number (53315990).

Almost surely, 2^1264565340 is an apocalyptic number.

1264565340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264565340 is an abundant number, since it is smaller than the sum of its proper divisors (2574185940).

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

1264565340 is a wasteful number, since it uses less digits than its factorization.

1264565340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5331 (or 5326 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 1264565340 is about 35560.7274953705. The cubic root of 1264565340 is about 1081.3852081689.

The spelling of 1264565340 in words is "one billion, two hundred sixty-four million, five hundred sixty-five thousand, three hundred forty".