921434 has 16 divisors (see below), whose sum is σ = 1501416. Its totient is φ = 422400.

The previous prime is 921409. The next prime is 921457. The reversal of 921434 is 434129.

It can be written as a sum of positive squares in 4 ways, for example, as 801025 + 120409 = 895^2 + 347^2 .

It is an alternating number because its digits alternate between odd and even.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 921434.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1064 + ... + 1724.

2⁹²¹⁴³⁴ is an apocalyptic number.

921434 is a deficient number, since it is larger than the sum of its proper divisors (579982).

921434 is a wasteful number, since it uses less digits than its factorization.

921434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721.

The product of its digits is 864, while the sum is 23.

The square root of 921434 is about 959.9135377731. The cubic root of 921434 is about 97.3093887222.

The spelling of 921434 in words is "nine hundred twenty-one thousand, four hundred thirty-four".