1872121105 has 8 divisors (see below), whose sum is σ = 2253334464. Its totient is φ = 1493170800.

The previous prime is 1872121063. The next prime is 1872121117. The reversal of 1872121105 is 5011212781.

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

It is not a de Polignac number, because 1872121105 - 2¹¹ = 1872119057 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 563941 + ... + 567250.

It is an arithmetic number, because the mean of its divisors is an integer number (281666808).

Almost surely, 2^1872121105 is an apocalyptic number.

It is an amenable number.

1872121105 is a deficient number, since it is larger than the sum of its proper divisors (381213359).

1872121105 is a wasteful number, since it uses less digits than its factorization.

1872121105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131527.

The product of its (nonzero) digits is 1120, while the sum is 28.

The square root of 1872121105 is about 43268.0148030852. The cubic root of 1872121105 is about 1232.4746058319.

Adding to 1872121105 its reverse (5011212781), we get a palindrome (6883333886).

The spelling of 1872121105 in words is "one billion, eight hundred seventy-two million, one hundred twenty-one thousand, one hundred five".