1252344340 has 96 divisors (see below), whose sum is σ = 3019968000. Its totient is φ = 432387072.

The previous prime is 1252344329. The next prime is 1252344377. The reversal of 1252344340 is 434432521.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1252344299 and 1252344308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 388656 + ... + 391864.

It is an arithmetic number, because the mean of its divisors is an integer number (31458000).

Almost surely, 2^1252344340 is an apocalyptic number.

1252344340 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 1252344340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1509984000).

1252344340 is an abundant number, since it is smaller than the sum of its proper divisors (1767623660).

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

1252344340 is a wasteful number, since it uses less digits than its factorization.

1252344340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3329 (or 3327 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 1252344340 is about 35388.4775032778. The cubic root of 1252344340 is about 1077.8903547770.

Adding to 1252344340 its reverse (434432521), we get a palindrome (1686776861).

The spelling of 1252344340 in words is "one billion, two hundred fifty-two million, three hundred forty-four thousand, three hundred forty".