1148531139 has 36 divisors (see below), whose sum is σ = 1933150440. Its totient is φ = 655179840.

The previous prime is 1148531129. The next prime is 1148531141. The reversal of 1148531139 is 9311358411.

It is a happy number.

1148531139 is a `hidden beast` number, since 11 + 485 + 31 + 139 = 666.

It is not a de Polignac number, because 1148531139 - 2⁴ = 1148531123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1148531129) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 302847 + ... + 306615.

Almost surely, 2^1148531139 is an apocalyptic number.

1148531139 is a deficient number, since it is larger than the sum of its proper divisors (784619301).

1148531139 is a wasteful number, since it uses less digits than its factorization.

1148531139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4480 (or 4470 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1148531139 is about 33889.9858217734. The cubic root of 1148531139 is about 1047.2433021596.

It can be divided in two parts, 11485 and 31139, that added together give a palindrome (42624).

The spelling of 1148531139 in words is "one billion, one hundred forty-eight million, five hundred thirty-one thousand, one hundred thirty-nine".