145491866 has 16 divisors (see below), whose sum is σ = 242608128. Its totient is φ = 64983600.

The previous prime is 145491823. The next prime is 145491887. The reversal of 145491866 is 668194541.

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, 89450 + ... + 91061.

It is an arithmetic number, because the mean of its divisors is an integer number (15163008).

Almost surely, 2^145491866 is an apocalyptic number.

145491866 is a deficient number, since it is larger than the sum of its proper divisors (97116262).

145491866 is a wasteful number, since it uses less digits than its factorization.

145491866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180557.

The product of its digits is 207360, while the sum is 44.

The square root of 145491866 is about 12062.0009119549. Note that the first 3 decimals coincide. The cubic root of 145491866 is about 525.9521538884.

The spelling of 145491866 in words is "one hundred forty-five million, four hundred ninety-one thousand, eight hundred sixty-six".