1250561166 has 16 divisors (see below), whose sum is σ = 2531257344. Its totient is φ = 411831224.

The previous prime is 1250561159. The next prime is 1250561233. The reversal of 1250561166 is 6611650521.

It is a congruent 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, 1255086 + ... + 1256081.

It is an arithmetic number, because the mean of its divisors is an integer number (158203584).

Almost surely, 2^1250561166 is an apocalyptic number.

1250561166 is an abundant number, since it is smaller than the sum of its proper divisors (1280696178).

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

1250561166 is a wasteful number, since it uses less digits than its factorization.

1250561166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511255.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 1250561166 is about 35363.2742545144. The cubic root of 1250561166 is about 1077.3785202990.

The spelling of 1250561166 in words is "one billion, two hundred fifty million, five hundred sixty-one thousand, one hundred sixty-six".