1201646 has 4 divisors (see below), whose sum is σ = 1802472. Its totient is φ = 600822.

The previous prime is 1201643. The next prime is 1201687. The reversal of 1201646 is 6461021.

It is a happy number.

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

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300410 + ... + 300413.

It is an arithmetic number, because the mean of its divisors is an integer number (450618).

2^1201646 is an apocalyptic number.

1201646 is a deficient number, since it is larger than the sum of its proper divisors (600826).

1201646 is an equidigital number, since it uses as much as digits as its factorization.

1201646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600825.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1201646 is about 1096.1961503308. The cubic root of 1201646 is about 106.3144218313.

Adding to 1201646 its reverse (6461021), we get a palindrome (7662667).

The spelling of 1201646 in words is "one million, two hundred one thousand, six hundred forty-six".