321906146 has 4 divisors (see below), whose sum is σ = 482859222. Its totient is φ = 160953072.

The previous prime is 321906133. The next prime is 321906157. The reversal of 321906146 is 641609123.

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

It can be written as a sum of positive squares in only one way, i.e., 182925625 + 138980521 = 13525^2 + 11789^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80476535 + ... + 80476538.

Almost surely, 2^321906146 is an apocalyptic number.

321906146 is a deficient number, since it is larger than the sum of its proper divisors (160953076).

321906146 is a wasteful number, since it uses less digits than its factorization.

321906146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160953075.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 321906146 is about 17941.7431148704. The cubic root of 321906146 is about 685.3458008598.

The spelling of 321906146 in words is "three hundred twenty-one million, nine hundred six thousand, one hundred forty-six".