1260427866 has 16 divisors (see below), whose sum is σ = 2588987424. Its totient is φ = 408787344.

The previous prime is 1260427859. The next prime is 1260427891. The reversal of 1260427866 is 6687240621.

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 7 ways as a sum of consecutive naturals, for example, 2838580 + ... + 2839023.

It is an arithmetic number, because the mean of its divisors is an integer number (161811714).

Almost surely, 2^1260427866 is an apocalyptic number.

1260427866 is an abundant number, since it is smaller than the sum of its proper divisors (1328559558).

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

1260427866 is a wasteful number, since it uses less digits than its factorization.

1260427866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5677645.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 1260427866 is about 35502.5050665442. The cubic root of 1260427866 is about 1080.2045411635.

It can be divided in two parts, 12604 and 27866, that added together give a triangular number (40470 = T₂₈₄).

The spelling of 1260427866 in words is "one billion, two hundred sixty million, four hundred twenty-seven thousand, eight hundred sixty-six".