1042042100 has 72 divisors (see below), whose sum is σ = 2533567008. Its totient is φ = 368668800.

The previous prime is 1042042093. The next prime is 1042042103. The reversal of 1042042100 is 12402401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042042103) 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, 27899 + ... + 53501.

Almost surely, 2^1042042100 is an apocalyptic number.

1042042100 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 1042042100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1266783504).

1042042100 is an abundant number, since it is smaller than the sum of its proper divisors (1491524908).

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

1042042100 is a wasteful number, since it uses less digits than its factorization.

1042042100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25665 (or 25658 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1042042100 is about 32280.6768826182. The cubic root of 1042042100 is about 1013.8221025738.

Adding to 1042042100 its reverse (12402401), we get a palindrome (1054444501).

The spelling of 1042042100 in words is "one billion, forty-two million, forty-two thousand, one hundred".