1242445253436 has 288 divisors, whose sum is σ = 3609109683200. Its totient is φ = 368530145280.

The previous prime is 1242445253429. The next prime is 1242445253449. The reversal of 1242445253436 is 6343525442421.

1242445253436 is a `hidden beast` number, since 1 + 2 + 42 + 4 + 45 + 2 + 534 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1242445253391 and 1242445253400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 342175341 + ... + 342178971.

Almost surely, 2^{1242445253436} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242445253436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1804554841600).

1242445253436 is an abundant number, since it is smaller than the sum of its proper divisors (2366664429764).

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

1242445253436 is a wasteful number, since it uses less digits than its factorization.

1242445253436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4274 (or 4249 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 45.

The spelling of 1242445253436 in words is "one trillion, two hundred forty-two billion, four hundred forty-five million, two hundred fifty-three thousand, four hundred thirty-six".