1231120425 has 48 divisors (see below), whose sum is σ = 2181467520. Its totient is φ = 611043840.

The previous prime is 1231120421. The next prime is 1231120439. The reversal of 1231120425 is 5240211321.

It is not a de Polignac number, because 1231120425 - 2² = 1231120421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231120421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54181 + ... + 73469.

It is an arithmetic number, because the mean of its divisors is an integer number (45447240).

Almost surely, 2^1231120425 is an apocalyptic number.

1231120425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1231120425 is a deficient number, since it is larger than the sum of its proper divisors (950347095).

1231120425 is a wasteful number, since it uses less digits than its factorization.

1231120425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19362 (or 19357 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1231120425 is about 35087.3257031652. The cubic root of 1231120425 is about 1071.7665014687.

Adding to 1231120425 its reverse (5240211321), we get a palindrome (6471331746).

The spelling of 1231120425 in words is "one billion, two hundred thirty-one million, one hundred twenty thousand, four hundred twenty-five".