1231425436 has 6 divisors (see below), whose sum is σ = 2154994520. Its totient is φ = 615712716.

The previous prime is 1231425407. The next prime is 1231425439. The reversal of 1231425436 is 6345241321.

It is a junction number, because it is equal to n+sod(n) for n = 1231425398 and 1231425407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231425439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153928176 + ... + 153928183.

Almost surely, 2^1231425436 is an apocalyptic number.

It is an amenable number.

1231425436 is a deficient number, since it is larger than the sum of its proper divisors (923569084).

1231425436 is a wasteful number, since it uses less digits than its factorization.

1231425436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307856363 (or 307856361 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 1231425436 is about 35091.6718894954. The cubic root of 1231425436 is about 1071.8550044759.

Adding to 1231425436 its reverse (6345241321), we get a palindrome (7576666757).

The spelling of 1231425436 in words is "one billion, two hundred thirty-one million, four hundred twenty-five thousand, four hundred thirty-six".