1252401540240 has 160 divisors (see below), whose sum is σ = 4062114650880. Its totient is φ = 318596179968.

The previous prime is 1252401540227. The next prime is 1252401540283. The reversal of 1252401540240 is 420451042521.

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

It is a junction number, because it is equal to n+sod(n) for n = 1252401540198 and 1252401540207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1754826 + ... + 2363094.

It is an arithmetic number, because the mean of its divisors is an integer number (25388216568).

Almost surely, 2^{1252401540240} is an apocalyptic number.

1252401540240 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 1252401540240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2031057325440).

1252401540240 is an abundant number, since it is smaller than the sum of its proper divisors (2809713110640).

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

1252401540240 is a wasteful number, since it uses less digits than its factorization.

1252401540240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608681 (or 608675 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 1252401540240 its reverse (420451042521), we get a palindrome (1672852582761).

The spelling of 1252401540240 in words is "one trillion, two hundred fifty-two billion, four hundred one million, five hundred forty thousand, two hundred forty".