1206145780 has 96 divisors (see below), whose sum is σ = 2972390400. Its totient is φ = 410941440.

The previous prime is 1206145777. The next prime is 1206145781. The reversal of 1206145780 is 875416021.

1206145780 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1206145780² = 2909575285223616800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206145781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1323525 + ... + 1324435.

It is an arithmetic number, because the mean of its divisors is an integer number (30962400).

Almost surely, 2^1206145780 is an apocalyptic number.

1206145780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1206145780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1486195200).

1206145780 is an abundant number, since it is smaller than the sum of its proper divisors (1766244620).

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

1206145780 is a wasteful number, since it uses less digits than its factorization.

1206145780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134 (or 1118 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 1206145780 is about 34729.6095572640. The cubic root of 1206145780 is about 1064.4696103370.

The spelling of 1206145780 in words is "one billion, two hundred six million, one hundred forty-five thousand, seven hundred eighty".