1251223432 has 16 divisors (see below), whose sum is σ = 2360989260. Its totient is φ = 621626304.

The previous prime is 1251223411. The next prime is 1251223471. The reversal of 1251223432 is 2343221521.

It can be written as a sum of positive squares in 2 ways, for example, as 1231027396 + 20196036 = 35086^2 + 4494^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1251223397 and 1251223406.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496843 + ... + 499354.

Almost surely, 2^1251223432 is an apocalyptic number.

It is an amenable number.

1251223432 is a deficient number, since it is larger than the sum of its proper divisors (1109765828).

1251223432 is a wasteful number, since it uses less digits than its factorization.

1251223432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996360 (or 996356 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 1251223432 is about 35372.6367691186. The cubic root of 1251223432 is about 1077.5686710002.

Adding to 1251223432 its reverse (2343221521), we get a palindrome (3594444953).

The spelling of 1251223432 in words is "one billion, two hundred fifty-one million, two hundred twenty-three thousand, four hundred thirty-two".