1043042421400 has 96 divisors (see below), whose sum is σ = 2775205946880. Its totient is φ = 357138000000.

The previous prime is 1043042421361. The next prime is 1043042421403. The reversal of 1043042421400 is 41242403401.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043042421403) 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 23 ways as a sum of consecutive naturals, for example, 555375 + ... + 1547425.

It is an arithmetic number, because the mean of its divisors is an integer number (28908395280).

Almost surely, 2^{1043042421400} is an apocalyptic number.

1043042421400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1043042421400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1387602973440).

1043042421400 is an abundant number, since it is smaller than the sum of its proper divisors (1732163525480).

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

1043042421400 is a wasteful number, since it uses less digits than its factorization.

1043042421400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992825 (or 992816 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 1043042421400 its reverse (41242403401), we get a palindrome (1084284824801).

The spelling of 1043042421400 in words is "one trillion, forty-three billion, forty-two million, four hundred twenty-one thousand, four hundred".