1921493 has 16 divisors (see below), whose sum is σ = 2369664. Its totient is φ = 1520640.

The previous prime is 1921483. The next prime is 1921499. The reversal of 1921493 is 3941291.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1921493 - 2⁴ = 1921477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921499) 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, 7853 + ... + 8093.

It is an arithmetic number, because the mean of its divisors is an integer number (148104).

2^1921493 is an apocalyptic number.

It is an amenable number.

1921493 is a deficient number, since it is larger than the sum of its proper divisors (448171).

1921493 is a wasteful number, since it uses less digits than its factorization.

1921493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332.

The product of its digits is 1944, while the sum is 29.

The square root of 1921493 is about 1386.1792813341. The cubic root of 1921493 is about 124.3215078506.

It can be divided in two parts, 19 and 21493, that added together give a palindrome (21512).

The spelling of 1921493 in words is "one million, nine hundred twenty-one thousand, four hundred ninety-three".