1042221400 has 72 divisors (see below), whose sum is σ = 2663540460. Its totient is φ = 378980800.

The previous prime is 1042221377. The next prime is 1042221403. The reversal of 1042221400 is 41222401.

1042221400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042221403) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2667 + ... + 45733.

Almost surely, 2^1042221400 is an apocalyptic number.

1042221400 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 1042221400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1331770230).

1042221400 is an abundant number, since it is smaller than the sum of its proper divisors (1621319060).

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

1042221400 is a wasteful number, since it uses less digits than its factorization.

1042221400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43105 (or 43085 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1042221400 is about 32283.4539663897. The cubic root of 1042221400 is about 1013.8802473385.

Adding to 1042221400 its reverse (41222401), we get a palindrome (1083443801).

The spelling of 1042221400 in words is "one billion, forty-two million, two hundred twenty-one thousand, four hundred".