146221286 has 4 divisors (see below), whose sum is σ = 219331932. Its totient is φ = 73110642.

The previous prime is 146221279. The next prime is 146221297. The reversal of 146221286 is 682122641.

146221286 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36555320 + ... + 36555323.

It is an arithmetic number, because the mean of its divisors is an integer number (54832983).

Almost surely, 2^146221286 is an apocalyptic number.

146221286 is a deficient number, since it is larger than the sum of its proper divisors (73110646).

146221286 is an equidigital number, since it uses as much as digits as its factorization.

146221286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73110645.

The product of its digits is 9216, while the sum is 32.

The square root of 146221286 is about 12092.1993863813. The cubic root of 146221286 is about 526.8296386280.

The spelling of 146221286 in words is "one hundred forty-six million, two hundred twenty-one thousand, two hundred eighty-six".