1042543100 has 36 divisors (see below), whose sum is σ = 2264756088. Its totient is φ = 416568000.

The previous prime is 1042543093. The next prime is 1042543123. The reversal of 1042543100 is 13452401.

It is a super-2 number, since 2×1042543100² = 2173792230715220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 96995 + ... + 107205.

Almost surely, 2^1042543100 is an apocalyptic number.

1042543100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1042543100 is an abundant number, since it is smaller than the sum of its proper divisors (1222212988).

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

1042543100 is a wasteful number, since it uses less digits than its factorization.

1042543100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11246 (or 11239 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1042543100 is about 32288.4360104357. The cubic root of 1042543100 is about 1013.9845539418.

1042543100 divided by its sum of digits (20) gives a triangular number (52127155 = T₁₀₂₁₀).

Adding to 1042543100 its reverse (13452401), we get a palindrome (1055995501).

The spelling of 1042543100 in words is "one billion, forty-two million, five hundred forty-three thousand, one hundred".