1913121 has 12 divisors (see below), whose sum is σ = 3158272. Its totient is φ = 1093176.

The previous prime is 1913099. The next prime is 1913123. The reversal of 1913121 is 1213191.

It is not a de Polignac number, because 1913121 - 2⁵ = 1913089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1913094 and 1913103.

It is not an unprimeable number, because it can be changed into a prime (1913123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15121 + ... + 15246.

2^1913121 is an apocalyptic number.

It is an amenable number.

1913121 is a deficient number, since it is larger than the sum of its proper divisors (1245151).

1913121 is a wasteful number, since it uses less digits than its factorization.

1913121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30380 (or 30377 counting only the distinct ones).

The product of its digits is 54, while the sum is 18.

The square root of 1913121 is about 1383.1561733947. The cubic root of 1913121 is about 124.1406875266.

The spelling of 1913121 in words is "one million, nine hundred thirteen thousand, one hundred twenty-one".