1231025130 has 24 divisors (see below), whose sum is σ = 3200665572. Its totient is φ = 328273344.

The previous prime is 1231025119. The next prime is 1231025137. The reversal of 1231025130 is 315201321.

It can be written as a sum of positive squares in 2 ways, for example, as 1201246281 + 29778849 = 34659^2 + 5457^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1231025137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6838939 + ... + 6839118.

Almost surely, 2^1231025130 is an apocalyptic number.

1231025130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231025130 is an abundant number, since it is smaller than the sum of its proper divisors (1969640442).

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

1231025130 is a wasteful number, since it uses less digits than its factorization.

1231025130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13678070 (or 13678067 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1231025130 is about 35085.9677079028. The cubic root of 1231025130 is about 1071.7388473573.

Adding to 1231025130 its reverse (315201321), we get a palindrome (1546226451).

The spelling of 1231025130 in words is "one billion, two hundred thirty-one million, twenty-five thousand, one hundred thirty".