1200040045 has 16 divisors (see below), whose sum is σ = 1469605680. Its totient is φ = 940386304.

The previous prime is 1200040043. The next prime is 1200040073. The reversal of 1200040045 is 5400400021.

It can be written as a sum of positive squares in 8 ways, for example, as 361532196 + 838507849 = 19014^2 + 28957^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200040045 - 2¹ = 1200040043 is a prime.

It is a super-2 number, since 2×1200040045² = 2880192219207204050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200040043) 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, 176061 + ... + 182749.

It is an arithmetic number, because the mean of its divisors is an integer number (91850355).

Almost surely, 2^1200040045 is an apocalyptic number.

It is an amenable number.

1200040045 is a deficient number, since it is larger than the sum of its proper divisors (269565635).

1200040045 is an equidigital number, since it uses as much as digits as its factorization.

1200040045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7424.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1200040045 is about 34641.5941463438. The cubic root of 1200040045 is about 1062.6703896518.

Adding to 1200040045 its reverse (5400400021), we get a palindrome (6600440066).

The spelling of 1200040045 in words is "one billion, two hundred million, forty thousand, forty-five".