1264120740 has 36 divisors (see below), whose sum is σ = 3834500124. Its totient is φ = 337098816.

The previous prime is 1264120727. The next prime is 1264120777. The reversal of 1264120740 is 470214621.

1264120740 is a `hidden beast` number, since 12 + 641 + 2 + 0 + 7 + 4 + 0 = 666.

1264120740 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 579461184 + 684659556 = 24072^2 + 26166^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3511267 + ... + 3511626.

Almost surely, 2^1264120740 is an apocalyptic number.

1264120740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264120740 is an abundant number, since it is smaller than the sum of its proper divisors (2570379384).

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

1264120740 is a wasteful number, since it uses less digits than its factorization.

1264120740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7022908 (or 7022903 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 1264120740 is about 35554.4756676287. The cubic root of 1264120740 is about 1081.2584610028.

The spelling of 1264120740 in words is "one billion, two hundred sixty-four million, one hundred twenty thousand, seven hundred forty".