1261704894 has 8 divisors (see below), whose sum is σ = 2523409800. Its totient is φ = 420568296.

The previous prime is 1261704889. The next prime is 1261704947. The reversal of 1261704894 is 4984071621.

1261704894 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

1261704894 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105142069 + ... + 105142080.

It is an arithmetic number, because the mean of its divisors is an integer number (315426225).

Almost surely, 2^1261704894 is an apocalyptic number.

1261704894 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1261704894 is a wasteful number, since it uses less digits than its factorization.

1261704894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210284154.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 1261704894 is about 35520.4855541137. The cubic root of 1261704894 is about 1080.5692283915.

The spelling of 1261704894 in words is "one billion, two hundred sixty-one million, seven hundred four thousand, eight hundred ninety-four".