1231342432 has 48 divisors (see below), whose sum is σ = 2451072960. Its totient is φ = 608891008.

The previous prime is 1231342423. The next prime is 1231342447. The reversal of 1231342432 is 2342431321.

It is a junction number, because it is equal to n+sod(n) for n = 1231342397 and 1231342406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1299783 + ... + 1300729.

It is an arithmetic number, because the mean of its divisors is an integer number (51064020).

Almost surely, 2^1231342432 is an apocalyptic number.

It is an amenable number.

1231342432 is a deficient number, since it is larger than the sum of its proper divisors (1219730528).

1231342432 is a wasteful number, since it uses less digits than its factorization.

1231342432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363 (or 1355 counting only the distinct ones).

The product of its digits is 3456, while the sum is 25.

The square root of 1231342432 is about 35090.4891957921. The cubic root of 1231342432 is about 1071.8309212064.

Adding to 1231342432 its reverse (2342431321), we get a palindrome (3573773753).

Subtracting 1231342432 from its reverse (2342431321), we obtain a square (1111088889 = 33333²).

It can be divided in two parts, 12313 and 42432, that added together give a palindrome (54745).

The spelling of 1231342432 in words is "one billion, two hundred thirty-one million, three hundred forty-two thousand, four hundred thirty-two".