1242358889500 has 24 divisors (see below), whose sum is σ = 2713311815760. Its totient is φ = 496943555600.

The previous prime is 1242358889483. The next prime is 1242358889573. The reversal of 1242358889500 is 59888532421.

It is a super-2 number, since 2×1242358889500² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1242358390 + ... + 1242359389.

It is an arithmetic number, because the mean of its divisors is an integer number (113054658990).

Almost surely, 2^{1242358889500} is an apocalyptic number.

1242358889500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242358889500 is an abundant number, since it is smaller than the sum of its proper divisors (1470952926260).

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

1242358889500 is a wasteful number, since it uses less digits than its factorization.

1242358889500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484717798 (or 2484717786 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 55.

The spelling of 1242358889500 in words is "one trillion, two hundred forty-two billion, three hundred fifty-eight million, eight hundred eighty-nine thousand, five hundred".