1245530320520 has 16 divisors (see below), whose sum is σ = 2802443221260. Its totient is φ = 498212128192.

The previous prime is 1245530320481. The next prime is 1245530320553. The reversal of 1245530320520 is 250230355421.

It can be written as a sum of positive squares in 2 ways, for example, as 1089756439396 + 155773881124 = 1043914^2 + 394682^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15569128967 + ... + 15569129046.

Almost surely, 2^{1245530320520} is an apocalyptic number.

1245530320520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245530320520 is an abundant number, since it is smaller than the sum of its proper divisors (1556912900740).

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

1245530320520 is a wasteful number, since it uses less digits than its factorization.

1245530320520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31138258024 (or 31138258020 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 1245530320520 its reverse (250230355421), we get a palindrome (1495760675941).

The spelling of 1245530320520 in words is "one trillion, two hundred forty-five billion, five hundred thirty million, three hundred twenty thousand, five hundred twenty".