876421 has 8 divisors (see below), whose sum is σ = 1078784. Its totient is φ = 693360.

The previous prime is 876373. The next prime is 876431. The reversal of 876421 is 124678.

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

It is a cyclic number.

It is not a de Polignac number, because 876421 - 2¹¹ = 874373 is a prime.

It is a super-2 number, since 2×876421² = 1536227538482, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 876421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (876431) 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, 4725 + ... + 4906.

It is an arithmetic number, because the mean of its divisors is an integer number (134848).

2⁸⁷⁶⁴²¹ is an apocalyptic number.

876421 is the 541-st hex number.

It is an amenable number.

876421 is a deficient number, since it is larger than the sum of its proper divisors (202363).

876421 is a wasteful number, since it uses less digits than its factorization.

876421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9651.

The product of its digits is 2688, while the sum is 28.

The square root of 876421 is about 936.1735950132. The cubic root of 876421 is about 95.6983078061.

The spelling of 876421 in words is "eight hundred seventy-six thousand, four hundred twenty-one".