1931121 has 16 divisors (see below), whose sum is σ = 2899520. Its totient is φ = 1285956.

The previous prime is 1931113. The next prime is 1931123. The reversal of 1931121 is 1211391.

It is not a de Polignac number, because 1931121 - 2³ = 1931113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1931094 and 1931103.

It is not an unprimeable number, because it can be changed into a prime (1931123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1746 + ... + 2628.

It is an arithmetic number, because the mean of its divisors is an integer number (181220).

2^1931121 is an apocalyptic number.

It is an amenable number.

1931121 is a deficient number, since it is larger than the sum of its proper divisors (968399).

1931121 is an frugal number, since it uses more digits than its factorization.

1931121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904 (or 886 counting only the distinct ones).

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

The square root of 1931121 is about 1389.6477971054. The cubic root of 1931121 is about 124.5288073853.

The spelling of 1931121 in words is "one million, nine hundred thirty-one thousand, one hundred twenty-one".