405121103 has 16 divisors (see below), whose sum is σ = 444297216. Its totient is φ = 368232480.

The previous prime is 405121049. The next prime is 405121109. The reversal of 405121103 is 301121504.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405121103 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 (405121109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31058 + ... + 42128.

It is an arithmetic number, because the mean of its divisors is an integer number (27768576).

Almost surely, 2^405121103 is an apocalyptic number.

405121103 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

405121103 is a deficient number, since it is larger than the sum of its proper divisors (39176113).

405121103 is a wasteful number, since it uses less digits than its factorization.

405121103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11174.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 405121103 is about 20127.6204008323. The cubic root of 405121103 is about 739.9373595625.

Adding to 405121103 its reverse (301121504), we get a palindrome (706242607).

It can be divided in two parts, 405121 and 103, that added together give a cube (405224 = 74³).

The spelling of 405121103 in words is "four hundred five million, one hundred twenty-one thousand, one hundred three".