1261447875 has 48 divisors (see below), whose sum is σ = 2278855488. Its totient is φ = 671328000.

The previous prime is 1261447843. The next prime is 1261447897. The reversal of 1261447875 is 5787441621.

1261447875 is a `hidden beast` number, since 126 + 1 + 447 + 87 + 5 = 666.

It is not a de Polignac number, because 1261447875 - 2⁵ = 1261447843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1261447875.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 708987 + ... + 710763.

It is an arithmetic number, because the mean of its divisors is an integer number (47476156).

Almost surely, 2^1261447875 is an apocalyptic number.

1261447875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1261447875 is a deficient number, since it is larger than the sum of its proper divisors (1017407613).

1261447875 is a wasteful number, since it uses less digits than its factorization.

1261447875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429 (or 2416 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 1261447875 is about 35516.8674716676. The cubic root of 1261447875 is about 1080.4958499852.

The spelling of 1261447875 in words is "one billion, two hundred sixty-one million, four hundred forty-seven thousand, eight hundred seventy-five".