1264735730 has 16 divisors (see below), whose sum is σ = 2375504064. Its totient is φ = 483898800.

The previous prime is 1264735729. The next prime is 1264735763. The reversal of 1264735730 is 375374621.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2749196 + ... + 2749655.

It is an arithmetic number, because the mean of its divisors is an integer number (148469004).

Almost surely, 2^1264735730 is an apocalyptic number.

1264735730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1264735730 is a deficient number, since it is larger than the sum of its proper divisors (1110768334).

1264735730 is a wasteful number, since it uses less digits than its factorization.

1264735730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5498881.

The product of its (nonzero) digits is 105840, while the sum is 38.

The square root of 1264735730 is about 35563.1231755593. The cubic root of 1264735730 is about 1081.4337753049.

The spelling of 1264735730 in words is "one billion, two hundred sixty-four million, seven hundred thirty-five thousand, seven hundred thirty".