1152215144 has 8 divisors (see below), whose sum is σ = 2160403410. Its totient is φ = 576107568.

The previous prime is 1152215131. The next prime is 1152215159. The reversal of 1152215144 is 4415122511.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 631919044 + 520296100 = 25138^2 + 22810^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 72013439 + ... + 72013454.

Almost surely, 2^1152215144 is an apocalyptic number.

It is an amenable number.

1152215144 is a deficient number, since it is larger than the sum of its proper divisors (1008188266).

1152215144 is a wasteful number, since it uses less digits than its factorization.

1152215144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144026899 (or 144026895 counting only the distinct ones).

The product of its digits is 1600, while the sum is 26.

The square root of 1152215144 is about 33944.2947194370. The cubic root of 1152215144 is about 1048.3618125088.

Adding to 1152215144 its reverse (4415122511), we get a palindrome (5567337655).

The spelling of 1152215144 in words is "one billion, one hundred fifty-two million, two hundred fifteen thousand, one hundred forty-four".