1245243340 has 48 divisors (see below), whose sum is σ = 2944779264. Its totient is φ = 438206400.

The previous prime is 1245243317. The next prime is 1245243341. The reversal of 1245243340 is 433425421.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1245243299 and 1245243308.

It is not an unprimeable number, because it can be changed into a prime (1245243341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84474 + ... + 98113.

It is an arithmetic number, because the mean of its divisors is an integer number (61349568).

Almost surely, 2^1245243340 is an apocalyptic number.

1245243340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245243340 is an abundant number, since it is smaller than the sum of its proper divisors (1699535924).

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

1245243340 is a wasteful number, since it uses less digits than its factorization.

1245243340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182638 (or 182636 counting only the distinct ones).

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

The square root of 1245243340 is about 35288.0056109721. The cubic root of 1245243340 is about 1075.8492197155.

Adding to 1245243340 its reverse (433425421), we get a palindrome (1678668761).

The spelling of 1245243340 in words is "one billion, two hundred forty-five million, two hundred forty-three thousand, three hundred forty".