1252541243240 has 64 divisors (see below), whose sum is σ = 3221064956160. Its totient is φ = 429410096640.

The previous prime is 1252541243167. The next prime is 1252541243249. The reversal of 1252541243240 is 423421452521.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1252541243240.

It is not an unprimeable number, because it can be changed into a prime (1252541243249) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3678869 + ... + 4004891.

It is an arithmetic number, because the mean of its divisors is an integer number (50329139940).

Almost surely, 2^{1252541243240} is an apocalyptic number.

1252541243240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1252541243240 is an abundant number, since it is smaller than the sum of its proper divisors (1968523712920).

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

1252541243240 is a wasteful number, since it uses less digits than its factorization.

1252541243240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339762 (or 339758 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 1252541243240 its reverse (423421452521), we get a palindrome (1675962695761).

The spelling of 1252541243240 in words is "one trillion, two hundred fifty-two billion, five hundred forty-one million, two hundred forty-three thousand, two hundred forty".