1200065530 has 32 divisors (see below), whose sum is σ = 2366061840. Its totient is φ = 436208640.

The previous prime is 1200065509. The next prime is 1200065533. The reversal of 1200065530 is 355600021.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 947223729 + 252841801 = 30777^2 + 15901^2 .

It is not an unprimeable number, because it can be changed into a prime (1200065533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116781 + ... + 126640.

Almost surely, 2^1200065530 is an apocalyptic number.

1200065530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1200065530 is a deficient number, since it is larger than the sum of its proper divisors (1165996310).

1200065530 is a wasteful number, since it uses less digits than its factorization.

1200065530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243474.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 1200065530 is about 34641.9619825437. The cubic root of 1200065530 is about 1062.6779121683.

Adding to 1200065530 its reverse (355600021), we get a palindrome (1555665551).

The spelling of 1200065530 in words is "one billion, two hundred million, sixty-five thousand, five hundred thirty".