1206720102 has 64 divisors (see below), whose sum is σ = 2889676800. Its totient is φ = 328648320.

The previous prime is 1206720083. The next prime is 1206720121. The reversal of 1206720102 is 2010276021.

It is an interprime number because it is at equal distance from previous prime (1206720083) and next prime (1206720121).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent 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 in 31 ways as a sum of consecutive naturals, for example, 89952 + ... + 102492.

It is an arithmetic number, because the mean of its divisors is an integer number (45151200).

Almost surely, 2^1206720102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1206720102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1444838400).

1206720102 is an abundant number, since it is smaller than the sum of its proper divisors (1682956698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1206720102 is a wasteful number, since it uses less digits than its factorization.

1206720102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12661.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1206720102 is about 34737.8770508504. The cubic root of 1206720102 is about 1064.6385372107.

Adding to 1206720102 its reverse (2010276021), we get a palindrome (3216996123).

The spelling of 1206720102 in words is "one billion, two hundred six million, seven hundred twenty thousand, one hundred two".