1253123132240 has 80 divisors (see below), whose sum is σ = 3335559427200. Its totient is φ = 428889669120.

The previous prime is 1253123132213. The next prime is 1253123132263. The reversal of 1253123132240 is 422313213521.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1639715 + ... + 2279234.

It is an arithmetic number, because the mean of its divisors is an integer number (41694492840).

Almost surely, 2^{1253123132240} is an apocalyptic number.

1253123132240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253123132240 is an abundant number, since it is smaller than the sum of its proper divisors (2082436294960).

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

1253123132240 is a wasteful number, since it uses less digits than its factorization.

1253123132240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3919540 (or 3919534 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 1253123132240 its reverse (422313213521), we get a palindrome (1675436345761).

The spelling of 1253123132240 in words is "one trillion, two hundred fifty-three billion, one hundred twenty-three million, one hundred thirty-two thousand, two hundred forty".