1210825866 has 16 divisors (see below), whose sum is σ = 2428401600. Its totient is φ = 402483648.

The previous prime is 1210825859. The next prime is 1210825883. The reversal of 1210825866 is 6685280121.

It is a Curzon number.

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, 278911 + ... + 283218.

It is an arithmetic number, because the mean of its divisors is an integer number (151775100).

Almost surely, 2^1210825866 is an apocalyptic number.

1210825866 is an abundant number, since it is smaller than the sum of its proper divisors (1217575734).

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

1210825866 is a wasteful number, since it uses less digits than its factorization.

1210825866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562493.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 1210825866 is about 34796.9232260555. The cubic root of 1210825866 is about 1065.8446181751.

The spelling of 1210825866 in words is "one billion, two hundred ten million, eight hundred twenty-five thousand, eight hundred sixty-six".