1200040029 has 20 divisors (see below), whose sum is σ = 1836380700. Its totient is φ = 780511680.

The previous prime is 1200040003. The next prime is 1200040031. The reversal of 1200040029 is 9200400021.

It can be written as a sum of positive squares in 2 ways, for example, as 152028900 + 1048011129 = 12330^2 + 32373^2 .

It is not a de Polignac number, because 1200040029 - 2⁷ = 1200039901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200039993 and 1200040020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200040529) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 177354 + ... + 183995.

It is an arithmetic number, because the mean of its divisors is an integer number (91819035).

Almost surely, 2^1200040029 is an apocalyptic number.

It is an amenable number.

1200040029 is a deficient number, since it is larger than the sum of its proper divisors (636340671).

1200040029 is an equidigital number, since it uses as much as digits as its factorization.

1200040029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361402 (or 361393 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1200040029 is about 34641.5939154075. The cubic root of 1200040029 is about 1062.6703849290.

The spelling of 1200040029 in words is "one billion, two hundred million, forty thousand, twenty-nine".