1012531500 has 144 divisors (see below), whose sum is σ = 3211703040. Its totient is φ = 268531200.

The previous prime is 1012531483. The next prime is 1012531519. The reversal of 1012531500 is 51352101.

1012531500 is a `hidden beast` number, since 10 + 125 + 31 + 500 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1002996 + ... + 1004004.

Almost surely, 2^1012531500 is an apocalyptic number.

1012531500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1012531500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1605851520).

1012531500 is an abundant number, since it is smaller than the sum of its proper divisors (2199171540).

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

1012531500 is a wasteful number, since it uses less digits than its factorization.

1012531500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257 (or 1242 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 1012531500 is about 31820.3001242917. The cubic root of 1012531500 is about 1004.1598384167.

Adding to 1012531500 its reverse (51352101), we get a palindrome (1063883601).

The spelling of 1012531500 in words is "one billion, twelve million, five hundred thirty-one thousand, five hundred".