1265200144 has 40 divisors (see below), whose sum is σ = 2696077440. Its totient is φ = 571509888.

The previous prime is 1265200141. The next prime is 1265200147. The reversal of 1265200144 is 4410025621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1265200141) and next prime (1265200147).

It is not an unprimeable number, because it can be changed into a prime (1265200141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54934 + ... + 74485.

It is an arithmetic number, because the mean of its divisors is an integer number (67401936).

Almost surely, 2^1265200144 is an apocalyptic number.

It is an amenable number.

1265200144 is an abundant number, since it is smaller than the sum of its proper divisors (1430877296).

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

1265200144 is a wasteful number, since it uses less digits than its factorization.

1265200144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129487 (or 129481 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 1265200144 is about 35569.6520084186. The cubic root of 1265200144 is about 1081.5661274668.

Adding to 1265200144 its reverse (4410025621), we get a palindrome (5675225765).

The spelling of 1265200144 in words is "one billion, two hundred sixty-five million, two hundred thousand, one hundred forty-four".