1245204340 has 48 divisors (see below), whose sum is σ = 2656281600. Its totient is φ = 490257152.

The previous prime is 1245204299. The next prime is 1245204341. The reversal of 1245204340 is 434025421.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245204341) 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, 423957 + ... + 426883.

It is an arithmetic number, because the mean of its divisors is an integer number (55339200).

Almost surely, 2^1245204340 is an apocalyptic number.

1245204340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245204340 is an abundant number, since it is smaller than the sum of its proper divisors (1411077260).

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

1245204340 is a wasteful number, since it uses less digits than its factorization.

1245204340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3264 (or 3262 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1245204340 is about 35287.4530109499. The cubic root of 1245204340 is about 1075.8379880265.

Adding to 1245204340 its reverse (434025421), we get a palindrome (1679229761).

The spelling of 1245204340 in words is "one billion, two hundred forty-five million, two hundred four thousand, three hundred forty".