1243211232 has 48 divisors (see below), whose sum is σ = 3316943952. Its totient is φ = 407608320.

The previous prime is 1243211231. The next prime is 1243211239. The reversal of 1243211232 is 2321123421.

It is a tau number, because it is divible by the number of its divisors (48).

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 = 1243211199 and 1243211208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243211231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100293 + ... + 112004.

It is an arithmetic number, because the mean of its divisors is an integer number (69102999).

Almost surely, 2^1243211232 is an apocalyptic number.

1243211232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1243211232 is an abundant number, since it is smaller than the sum of its proper divisors (2073732720).

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

1243211232 is a wasteful number, since it uses less digits than its factorization.

1243211232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212371 (or 212363 counting only the distinct ones).

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

The square root of 1243211232 is about 35259.2006715978. The cubic root of 1243211232 is about 1075.2636762972.

Adding to 1243211232 its reverse (2321123421), we get a palindrome (3564334653).

The spelling of 1243211232 in words is "one billion, two hundred forty-three million, two hundred eleven thousand, two hundred thirty-two".