1231342000 has 160 divisors (see below), whose sum is σ = 3425745024. Its totient is φ = 419328000.

The previous prime is 1231341997. The next prime is 1231342003. The reversal of 1231342000 is 2431321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1231341997) and next prime (1231342003).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1231342003) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 3933844 + ... + 3934156.

Almost surely, 2^1231342000 is an apocalyptic number.

1231342000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231342000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1712872512).

1231342000 is an abundant number, since it is smaller than the sum of its proper divisors (2194403024).

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

1231342000 is a wasteful number, since it uses less digits than its factorization.

1231342000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1231342000 is about 35090.4830402775. The cubic root of 1231342000 is about 1071.8307958606.

Adding to 1231342000 its reverse (2431321), we get a palindrome (1233773321).

The spelling of 1231342000 in words is "one billion, two hundred thirty-one million, three hundred forty-two thousand".