1201644146 has 8 divisors (see below), whose sum is σ = 1806008940. Its totient is φ = 599641168.

The previous prime is 1201644127. The next prime is 1201644149. The reversal of 1201644146 is 6414461021.

It can be written as a sum of positive squares in 2 ways, for example, as 1034329921 + 167314225 = 32161^2 + 12935^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1201644149) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 589181 + ... + 591216.

Almost surely, 2^1201644146 is an apocalyptic number.

1201644146 is a deficient number, since it is larger than the sum of its proper divisors (604364794).

1201644146 is a wasteful number, since it uses less digits than its factorization.

1201644146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180908.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 1201644146 is about 34664.7392316746. The cubic root of 1201644146 is about 1063.1436715436.

The spelling of 1201644146 in words is "one billion, two hundred one million, six hundred forty-four thousand, one hundred forty-six".