1206400530 has 16 divisors (see below), whose sum is σ = 2895361344. Its totient is φ = 321706800.

The previous prime is 1206400511. The next prime is 1206400537. The reversal of 1206400530 is 350046021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1206400497 and 1206400506.

It is not an unprimeable number, because it can be changed into a prime (1206400537) 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, 20106646 + ... + 20106705.

It is an arithmetic number, because the mean of its divisors is an integer number (180960084).

Almost surely, 2^1206400530 is an apocalyptic number.

1206400530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1206400530 is an abundant number, since it is smaller than the sum of its proper divisors (1688960814).

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

1206400530 is a wasteful number, since it uses less digits than its factorization.

1206400530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40213361.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1206400530 is about 34733.2769833196. The cubic root of 1206400530 is about 1064.5445472555.

Adding to 1206400530 its reverse (350046021), we get a palindrome (1556446551).

The spelling of 1206400530 in words is "one billion, two hundred six million, four hundred thousand, five hundred thirty".