1242920044400 has 30 divisors (see below), whose sum is σ = 2986115407632. Its totient is φ = 497168017600.

The previous prime is 1242920044361. The next prime is 1242920044409. The reversal of 1242920044400 is 44400292421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242920044409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1553649656 + ... + 1553650455.

Almost surely, 2^{1242920044400} is an apocalyptic number.

1242920044400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242920044400 is an abundant number, since it is smaller than the sum of its proper divisors (1743195363232).

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

1242920044400 is a wasteful number, since it uses less digits than its factorization.

1242920044400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107300129 (or 3107300118 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 1242920044400 in words is "one trillion, two hundred forty-two billion, nine hundred twenty million, forty-four thousand, four hundred".