1261546206 has 8 divisors (see below), whose sum is σ = 2523092424. Its totient is φ = 420515400.

The previous prime is 1261546199. The next prime is 1261546213. The reversal of 1261546206 is 6026451621.

It is an interprime number because it is at equal distance from previous prime (1261546199) and next prime (1261546213).

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

1261546206 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105128845 + ... + 105128856.

It is an arithmetic number, because the mean of its divisors is an integer number (315386553).

Almost surely, 2^1261546206 is an apocalyptic number.

1261546206 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.

1261546206 is a wasteful number, since it uses less digits than its factorization.

1261546206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210257706.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1261546206 is about 35518.2517306244. The cubic root of 1261546206 is about 1080.5239244646.

Adding to 1261546206 its reverse (6026451621), we get a palindrome (7287997827).

The spelling of 1261546206 in words is "one billion, two hundred sixty-one million, five hundred forty-six thousand, two hundred six".