949821 has 8 divisors (see below), whose sum is σ = 1276224. Its totient is φ = 628320.

The previous prime is 949811. The next prime is 949849. The reversal of 949821 is 128949.

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

It is not a de Polignac number, because 949821 - 2⁵ = 949789 is a prime.

It is a super-3 number, since 3×949821³ = 2570671346433343983, which contains 333 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (949811) 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, 745 + ... + 1566.

It is an arithmetic number, because the mean of its divisors is an integer number (159528).

2⁹⁴⁹⁸²¹ is an apocalyptic number.

It is an amenable number.

949821 is a deficient number, since it is larger than the sum of its proper divisors (326403).

949821 is a wasteful number, since it uses less digits than its factorization.

949821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451.

The product of its digits is 5184, while the sum is 33.

The square root of 949821 is about 974.5876050925. The cubic root of 949821 is about 98.2985826327.

It can be divided in two parts, 949 and 821, that added together give a triangular number (1770 = T₅₉).

The spelling of 949821 in words is "nine hundred forty-nine thousand, eight hundred twenty-one".