1205400103 has 8 divisors (see below), whose sum is σ = 1212005808. Its totient is φ = 1198807104.

The previous prime is 1205400101. The next prime is 1205400121. The reversal of 1205400103 is 3010045021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1205400103 - 2¹ = 1205400101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205400101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233476 + ... + 238582.

It is an arithmetic number, because the mean of its divisors is an integer number (151500726).

Almost surely, 2^1205400103 is an apocalyptic number.

1205400103 is a deficient number, since it is larger than the sum of its proper divisors (6605705).

1205400103 is a wasteful number, since it uses less digits than its factorization.

1205400103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6353.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1205400103 is about 34718.8724327274. The cubic root of 1205400103 is about 1064.2502023272.

Adding to 1205400103 its reverse (3010045021), we get a palindrome (4215445124).

The spelling of 1205400103 in words is "one billion, two hundred five million, four hundred thousand, one hundred three".