1042100444 has 72 divisors (see below), whose sum is σ = 2370921840. Its totient is φ = 396076800.

The previous prime is 1042100431. The next prime is 1042100447. The reversal of 1042100444 is 4440012401.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042100447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82502 + ... + 94290.

It is an arithmetic number, because the mean of its divisors is an integer number (32929470).

Almost surely, 2^1042100444 is an apocalyptic number.

1042100444 is a gapful number since it is divisible by the number (14) 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 1042100444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1185460920).

1042100444 is an abundant number, since it is smaller than the sum of its proper divisors (1328821396).

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

1042100444 is a wasteful number, since it uses less digits than its factorization.

1042100444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11859 (or 11850 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1042100444 is about 32281.5805684914. The cubic root of 1042100444 is about 1013.8410235409.

Adding to 1042100444 its reverse (4440012401), we get a palindrome (5482112845).

The spelling of 1042100444 in words is "one billion, forty-two million, one hundred thousand, four hundred forty-four".