1921459 has 4 divisors (see below), whose sum is σ = 2034504. Its totient is φ = 1808416.

The previous prime is 1921457. The next prime is 1921477. The reversal of 1921459 is 9541291.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1921459 - 2¹ = 1921457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1921459.

It is not an unprimeable number, because it can be changed into a prime (1921457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56497 + ... + 56530.

It is an arithmetic number, because the mean of its divisors is an integer number (508626).

2^1921459 is an apocalyptic number.

1921459 is a deficient number, since it is larger than the sum of its proper divisors (113045).

1921459 is a wasteful number, since it uses less digits than its factorization.

1921459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113044.

The product of its digits is 3240, while the sum is 31.

The square root of 1921459 is about 1386.1670173540. The cubic root of 1921459 is about 124.3207745742.

The spelling of 1921459 in words is "one million, nine hundred twenty-one thousand, four hundred fifty-nine".