1243214340 has 96 divisors (see below), whose sum is σ = 3609567360. Its totient is φ = 319334400.

The previous prime is 1243214339. The next prime is 1243214351. The reversal of 1243214340 is 434123421.

It is a self number, because there is not a number n which added to its sum of digits gives 1243214340.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1410700 + ... + 1411580.

It is an arithmetic number, because the mean of its divisors is an integer number (37599660).

Almost surely, 2^1243214340 is an apocalyptic number.

1243214340 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 1243214340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1804783680).

1243214340 is an abundant number, since it is smaller than the sum of its proper divisors (2366353020).

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

1243214340 is a wasteful number, since it uses less digits than its factorization.

1243214340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733 (or 1731 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1243214340 is about 35259.2447451729. The cubic root of 1243214340 is about 1075.2645723414.

Adding to 1243214340 its reverse (434123421), we get a palindrome (1677337761).

The spelling of 1243214340 in words is "one billion, two hundred forty-three million, two hundred fourteen thousand, three hundred forty".