3810904121 has 18 divisors (see below), whose sum is σ = 4046858298. Its totient is φ = 3586452000.

The previous prime is 3810904099. The next prime is 3810904151. The reversal of 3810904121 is 1214090183.

It can be written as a sum of positive squares in only one way, i.e., 2323722025 + 1487182096 = 48205^2 + 38564^2 .

It is not a de Polignac number, because 3810904121 - 2²⁶ = 3743795257 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 (3810904151) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12253556 + ... + 12253866.

It is an arithmetic number, because the mean of its divisors is an integer number (224825461).

Almost surely, 2^3810904121 is an apocalyptic number.

3810904121 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3810904121 is a deficient number, since it is larger than the sum of its proper divisors (235954177).

3810904121 is an frugal number, since it uses more digits than its factorization.

3810904121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 3810904121 is about 61732.5207730901. The cubic root of 3810904121 is about 1561.9819375708.

The spelling of 3810904121 in words is "three billion, eight hundred ten million, nine hundred four thousand, one hundred twenty-one".