1264613540 has 24 divisors (see below), whose sum is σ = 2656372992. Its totient is φ = 505715040.

The previous prime is 1264613507. The next prime is 1264613557. The reversal of 1264613540 is 453164621.

It is a junction number, because it is equal to n+sod(n) for n = 1264613497 and 1264613506.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 122375 + ... + 132305.

It is an arithmetic number, because the mean of its divisors is an integer number (110682208).

Almost surely, 2^1264613540 is an apocalyptic number.

1264613540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264613540 is an abundant number, since it is smaller than the sum of its proper divisors (1391759452).

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

1264613540 is a wasteful number, since it uses less digits than its factorization.

1264613540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16307 (or 16305 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 1264613540 is about 35561.4052028319. The cubic root of 1264613540 is about 1081.3989473047.

The spelling of 1264613540 in words is "one billion, two hundred sixty-four million, six hundred thirteen thousand, five hundred forty".