1243404100 has 36 divisors (see below), whose sum is σ = 2707459524. Its totient is φ = 495652480.

The previous prime is 1243404091. The next prime is 1243404119. The reversal of 1243404100 is 14043421.

It can be written as a sum of positive squares in 6 ways, for example, as 308634624 + 934769476 = 17568^2 + 30574^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8082 + ... + 50518.

It is an arithmetic number, because the mean of its divisors is an integer number (75207209).

Almost surely, 2^1243404100 is an apocalyptic number.

1243404100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243404100 is an abundant number, since it is smaller than the sum of its proper divisors (1464055424).

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

1243404100 is a wasteful number, since it uses less digits than its factorization.

1243404100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42744 (or 42737 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1243404100 is about 35261.9355679747. The cubic root of 1243404100 is about 1075.3192777981.

Adding to 1243404100 its reverse (14043421), we get a palindrome (1257447521).

The spelling of 1243404100 in words is "one billion, two hundred forty-three million, four hundred four thousand, one hundred".