434042821 has 8 divisors (see below), whose sum is σ = 476752320. Its totient is φ = 393319872.

The previous prime is 434042813. The next prime is 434042849. The reversal of 434042821 is 128240434.

It is a happy number.

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

It is not a de Polignac number, because 434042821 - 2³ = 434042813 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 434042821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (434042621) 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, 496180 + ... + 497053.

It is an arithmetic number, because the mean of its divisors is an integer number (59594040).

Almost surely, 2^434042821 is an apocalyptic number.

It is an amenable number.

434042821 is a deficient number, since it is larger than the sum of its proper divisors (42709499).

434042821 is a wasteful number, since it uses less digits than its factorization.

434042821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993275.

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 434042821 is about 20833.6943675384. The cubic root of 434042821 is about 757.1423275573.

It can be divided in two parts, 43404 and 2821, that added together give a square (46225 = 215²).

The spelling of 434042821 in words is "four hundred thirty-four million, forty-two thousand, eight hundred twenty-one".