1243920104 has 16 divisors (see below), whose sum is σ = 2665543200. Its totient is φ = 533108592.

The previous prime is 1243920061. The next prime is 1243920121. The reversal of 1243920104 is 4010293421.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11106374 + ... + 11106485.

It is an arithmetic number, because the mean of its divisors is an integer number (166596450).

Almost surely, 2^1243920104 is an apocalyptic number.

1243920104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1243920104 is an abundant number, since it is smaller than the sum of its proper divisors (1421623096).

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

1243920104 is a wasteful number, since it uses less digits than its factorization.

1243920104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22212872 (or 22212868 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1243920104 is about 35269.2515372810. The cubic root of 1243920104 is about 1075.4680072178.

The spelling of 1243920104 in words is "one billion, two hundred forty-three million, nine hundred twenty thousand, one hundred four".