1921137 has 8 divisors (see below), whose sum is σ = 2624160. Its totient is φ = 1249440.

The previous prime is 1921133. The next prime is 1921159. The reversal of 1921137 is 7311291.

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

It is not a de Polignac number, because 1921137 - 2² = 1921133 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1921133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7687 + ... + 7932.

It is an arithmetic number, because the mean of its divisors is an integer number (328020).

2^1921137 is an apocalyptic number.

It is an amenable number.

1921137 is a deficient number, since it is larger than the sum of its proper divisors (703023).

1921137 is a wasteful number, since it uses less digits than its factorization.

1921137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15663.

The product of its digits is 378, while the sum is 24.

The square root of 1921137 is about 1386.0508648675. The cubic root of 1921137 is about 124.3138295868.

The spelling of 1921137 in words is "one million, nine hundred twenty-one thousand, one hundred thirty-seven".