1321242132 has 24 divisors (see below), whose sum is σ = 3523312576. Its totient is φ = 377497728.

The previous prime is 1321242073. The next prime is 1321242151. The reversal of 1321242132 is 2312421231.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1321242099 and 1321242108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7864453 + ... + 7864620.

Almost surely, 2^1321242132 is an apocalyptic number.

1321242132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321242132 is an abundant number, since it is smaller than the sum of its proper divisors (2202070444).

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

1321242132 is a wasteful number, since it uses less digits than its factorization.

1321242132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15729087 (or 15729085 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 1321242132 is about 36348.8945086367. The cubic root of 1321242132 is about 1097.3052861362.

Adding to 1321242132 its reverse (2312421231), we get a palindrome (3633663363).

The spelling of 1321242132 in words is "one billion, three hundred twenty-one million, two hundred forty-two thousand, one hundred thirty-two".