1200252144 has 80 divisors (see below), whose sum is σ = 3816200192. Its totient is φ = 316548864.

The previous prime is 1200252133. The next prime is 1200252149. The reversal of 1200252144 is 4412520021.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1200252144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200252149) 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, 133024 + ... + 141759.

Almost surely, 2^1200252144 is an apocalyptic number.

1200252144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1200252144 is an abundant number, since it is smaller than the sum of its proper divisors (2615948048).

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

1200252144 is a wasteful number, since it uses less digits than its factorization.

1200252144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274814 (or 274808 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1200252144 is about 34644.6553453776. The cubic root of 1200252144 is about 1062.7329925764.

Adding to 1200252144 its reverse (4412520021), we get a palindrome (5612772165).

It can be divided in two parts, 12002 and 52144, that added together give a palindrome (64146).

The spelling of 1200252144 in words is "one billion, two hundred million, two hundred fifty-two thousand, one hundred forty-four".