1206447121 has 8 divisors (see below), whose sum is σ = 1329156288. Its totient is φ = 1085910000.

The previous prime is 1206447113. The next prime is 1206447167. The reversal of 1206447121 is 1217446021.

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

It is a cyclic number.

It is not a de Polignac number, because 1206447121 - 2³ = 1206447113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1206447121.

It is not an unprimeable number, because it can be changed into a prime (1206447101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541845 + ... + 544066.

It is an arithmetic number, because the mean of its divisors is an integer number (166144536).

Almost surely, 2^1206447121 is an apocalyptic number.

1206447121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1206447121 is a deficient number, since it is larger than the sum of its proper divisors (122709167).

1206447121 is a wasteful number, since it uses less digits than its factorization.

1206447121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086023.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1206447121 is about 34733.9476737096. The cubic root of 1206447121 is about 1064.5582512605.

It can be divided in two parts, 120644 and 7121, that added together give a triangular number (127765 = T₅₀₅).

The spelling of 1206447121 in words is "one billion, two hundred six million, four hundred forty-seven thousand, one hundred twenty-one".