1200442145 has 16 divisors (see below), whose sum is σ = 1651698048. Its totient is φ = 820471680.

The previous prime is 1200442127. The next prime is 1200442147. The reversal of 1200442145 is 5412440021.

It is not a de Polignac number, because 1200442145 - 2⁶ = 1200442081 is a prime.

It is a super-2 number, since 2×1200442145² = 2882122686984402050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1200442145.

It is not an unprimeable number, because it can be changed into a prime (1200442147) 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, 45116 + ... + 66605.

It is an arithmetic number, because the mean of its divisors is an integer number (103231128).

Almost surely, 2^1200442145 is an apocalyptic number.

It is an amenable number.

1200442145 is a deficient number, since it is larger than the sum of its proper divisors (451255903).

1200442145 is a wasteful number, since it uses less digits than its factorization.

1200442145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112040.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1200442145 is about 34647.3973770037. The cubic root of 1200442145 is about 1062.7890668156.

Adding to 1200442145 its reverse (5412440021), we get a palindrome (6612882166).

The spelling of 1200442145 in words is "one billion, two hundred million, four hundred forty-two thousand, one hundred forty-five".