1243740900 has 36 divisors (see below), whose sum is σ = 3598557872. Its totient is φ = 331664160.

The previous prime is 1243740881. The next prime is 1243740917. The reversal of 1243740900 is 90473421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 2072602 + ... + 2073201.

Almost surely, 2^1243740900 is an apocalyptic number.

1243740900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243740900 is an abundant number, since it is smaller than the sum of its proper divisors (2354816972).

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

1243740900 is a wasteful number, since it uses less digits than its factorization.

1243740900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4145820 (or 4145813 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 1243740900 is about 35266.7109325494. The cubic root of 1243740900 is about 1075.4163593604.

The spelling of 1243740900 in words is "one billion, two hundred forty-three million, seven hundred forty thousand, nine hundred".