1261264704 has 168 divisors, whose sum is σ = 3933383040. Its totient is φ = 355590144.

The previous prime is 1261264699. The next prime is 1261264717. The reversal of 1261264704 is 4074621621.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 742384 + ... + 744080.

Almost surely, 2^1261264704 is an apocalyptic number.

1261264704 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1261264704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1966691520).

1261264704 is an abundant number, since it is smaller than the sum of its proper divisors (2672118336).

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

1261264704 is a wasteful number, since it uses less digits than its factorization.

1261264704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805 (or 1788 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 1261264704 is about 35514.2887300309. The cubic root of 1261264704 is about 1080.4435489509.

The spelling of 1261264704 in words is "one billion, two hundred sixty-one million, two hundred sixty-four thousand, seven hundred four".