921449 has 4 divisors (see below), whose sum is σ = 961536. Its totient is φ = 881364.

The previous prime is 921409. The next prime is 921457. The reversal of 921449 is 944129.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 921449 - 2¹² = 917353 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 921449.

It is not an unprimeable number, because it can be changed into a prime (921409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20009 + ... + 20054.

It is an arithmetic number, because the mean of its divisors is an integer number (240384).

2⁹²¹⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

921449 is a deficient number, since it is larger than the sum of its proper divisors (40087).

921449 is a wasteful number, since it uses less digits than its factorization.

921449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40086.

The product of its digits is 2592, while the sum is 29.

The square root of 921449 is about 959.9213509450. The cubic root of 921449 is about 97.3099167517.

The spelling of 921449 in words is "nine hundred twenty-one thousand, four hundred forty-nine".