1245315401220 has 144 divisors (see below), whose sum is σ = 3833710231680. Its totient is φ = 301814261760.

The previous prime is 1245315401219. The next prime is 1245315401221. The reversal of 1245315401220 is 221045135421.

It is an interprime number because it is at equal distance from previous prime (1245315401219) and next prime (1245315401221).

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

It is not an unprimeable number, because it can be changed into a prime (1245315401221) 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, 29955769 + ... + 29997311.

It is an arithmetic number, because the mean of its divisors is an integer number (26622987720).

Almost surely, 2^{1245315401220} is an apocalyptic number.

1245315401220 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 1245315401220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1916855115840).

1245315401220 is an abundant number, since it is smaller than the sum of its proper divisors (2588394830460).

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

1245315401220 is a wasteful number, since it uses less digits than its factorization.

1245315401220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45706 (or 45693 counting only the distinct ones).

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

The spelling of 1245315401220 in words is "one trillion, two hundred forty-five billion, three hundred fifteen million, four hundred one thousand, two hundred twenty".