1261046547 has 12 divisors (see below), whose sum is σ = 1824560400. Its totient is φ = 839290608.

The previous prime is 1261046441. The next prime is 1261046557. The reversal of 1261046547 is 7456401621.

1261046547 is a `hidden beast` number, since 1 + 2 + 6 + 104 + 6 + 547 = 666.

It is not a de Polignac number, because 1261046547 - 2⁷ = 1261046419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1261046557) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 111568 + ... + 122349.

It is an arithmetic number, because the mean of its divisors is an integer number (152046700).

Almost surely, 2^1261046547 is an apocalyptic number.

1261046547 is a deficient number, since it is larger than the sum of its proper divisors (563513853).

1261046547 is a wasteful number, since it uses less digits than its factorization.

1261046547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234522 (or 234519 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1261046547 is about 35511.2171996399. The cubic root of 1261046547 is about 1080.3812517150.

It can be divided in two parts, 126104 and 6547, that added together give a cube (132651 = 51³).

The spelling of 1261046547 in words is "one billion, two hundred sixty-one million, forty-six thousand, five hundred forty-seven".