1243040106 has 64 divisors (see below), whose sum is σ = 3234318336. Its totient is φ = 308827200.

The previous prime is 1243040081. The next prime is 1243040147. The reversal of 1243040106 is 6010403421.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47865 + ... + 69116.

It is an arithmetic number, because the mean of its divisors is an integer number (50536224).

Almost surely, 2^1243040106 is an apocalyptic number.

1243040106 is an abundant number, since it is smaller than the sum of its proper divisors (1991278230).

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

1243040106 is a wasteful number, since it uses less digits than its factorization.

1243040106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117027.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1243040106 is about 35256.7739023297. The cubic root of 1243040106 is about 1075.2143379358.

Adding to 1243040106 its reverse (6010403421), we get a palindrome (7253443527).

The spelling of 1243040106 in words is "one billion, two hundred forty-three million, forty thousand, one hundred six".