1245321541200 has 240 divisors, whose sum is σ = 4394088331776. Its totient is φ = 298964774400.

The previous prime is 1245321541193. The next prime is 1245321541201. The reversal of 1245321541200 is 21451235421.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245321541201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 901627 + ... + 1817573.

Almost surely, 2^{1245321541200} is an apocalyptic number.

1245321541200 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 1245321541200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2197044165888).

1245321541200 is an abundant number, since it is smaller than the sum of its proper divisors (3148766790576).

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

1245321541200 is a wasteful number, since it uses less digits than its factorization.

1245321541200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916082 (or 916071 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 1245321541200 its reverse (21451235421), we get a palindrome (1266772776621).

The spelling of 1245321541200 in words is "one trillion, two hundred forty-five billion, three hundred twenty-one million, five hundred forty-one thousand, two hundred".