1261870984 has 32 divisors (see below), whose sum is σ = 2601446400. Its totient is φ = 569056320.

The previous prime is 1261870933. The next prime is 1261871033. The reversal of 1261870984 is 4890781621.

It is a super-2 number, since 2×1261870984² = 3184636760522256512, which contains 22 as substring.

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, 45279 + ... + 67630.

It is an arithmetic number, because the mean of its divisors is an integer number (81295200).

Almost surely, 2^1261870984 is an apocalyptic number.

It is an amenable number.

1261870984 is an abundant number, since it is smaller than the sum of its proper divisors (1339575416).

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

1261870984 is a wasteful number, since it uses less digits than its factorization.

1261870984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113053 (or 113049 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 1261870984 is about 35522.8234238215. The cubic root of 1261870984 is about 1080.6166414513.

The spelling of 1261870984 in words is "one billion, two hundred sixty-one million, eight hundred seventy thousand, nine hundred eighty-four".