1231253000 has 64 divisors (see below), whose sum is σ = 2980551600. Its totient is φ = 475507200.

The previous prime is 1231252993. The next prime is 1231253027. The reversal of 1231253000 is 3521321.

It can be written as a sum of positive squares in 8 ways, for example, as 226743364 + 1004509636 = 15058^2 + 31694^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1231253000.

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 in 15 ways as a sum of consecutive naturals, for example, 7772 + ... + 50228.

Almost surely, 2^1231253000 is an apocalyptic number.

1231253000 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 1231253000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1490275800).

1231253000 is an abundant number, since it is smaller than the sum of its proper divisors (1749298600).

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

1231253000 is a wasteful number, since it uses less digits than its factorization.

1231253000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42507 (or 42493 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1231253000 is about 35089.2148672495. The cubic root of 1231253000 is about 1071.8049716679.

Adding to 1231253000 its reverse (3521321), we get a palindrome (1234774321).

The spelling of 1231253000 in words is "one billion, two hundred thirty-one million, two hundred fifty-three thousand".