1200651 has 4 divisors (see below), whose sum is σ = 1600872. Its totient is φ = 800432.

The previous prime is 1200643. The next prime is 1200673. The reversal of 1200651 is 1560021.

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

It is a cyclic number.

It is not a de Polignac number, because 1200651 - 2³ = 1200643 is a prime.

It is a D-number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1200651.

It is not an unprimeable number, because it can be changed into a prime (1200611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200106 + ... + 200111.

It is an arithmetic number, because the mean of its divisors is an integer number (400218).

2^1200651 is an apocalyptic number.

1200651 is a deficient number, since it is larger than the sum of its proper divisors (400221).

1200651 is an equidigital number, since it uses as much as digits as its factorization.

1200651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400220.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 1200651 is about 1095.7422142092. The cubic root of 1200651 is about 106.2850698535.

Adding to 1200651 its reverse (1560021), we get a palindrome (2760672).

The spelling of 1200651 in words is "one million, two hundred thousand, six hundred fifty-one".