1251542232 has 64 divisors (see below), whose sum is σ = 3481077600. Its totient is φ = 416632320.

The previous prime is 1251542221. The next prime is 1251542249. The reversal of 1251542232 is 2322451521.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1251542196 and 1251542205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181732 + ... + 188492.

Almost surely, 2^1251542232 is an apocalyptic number.

1251542232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1251542232 is an abundant number, since it is smaller than the sum of its proper divisors (2229535368).

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

1251542232 is a wasteful number, since it uses less digits than its factorization.

1251542232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7633 (or 7623 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 1251542232 is about 35377.1427902254. The cubic root of 1251542232 is about 1077.6601813603.

Adding to 1251542232 its reverse (2322451521), we get a palindrome (3573993753).

The spelling of 1251542232 in words is "one billion, two hundred fifty-one million, five hundred forty-two thousand, two hundred thirty-two".