878261421 has 8 divisors (see below), whose sum is σ = 1173097440. Its totient is φ = 584466512.

The previous prime is 878261399. The next prime is 878261431. The reversal of 878261421 is 124162878.

It is a happy number.

878261421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 878261421 - 2⁵ = 878261389 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 878261421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878261431) 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, 258306 + ... + 261683.

It is an arithmetic number, because the mean of its divisors is an integer number (146637180).

Almost surely, 2^878261421 is an apocalyptic number.

It is an amenable number.

878261421 is a deficient number, since it is larger than the sum of its proper divisors (294836019).

878261421 is a wasteful number, since it uses less digits than its factorization.

878261421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520555.

The product of its digits is 43008, while the sum is 39.

The square root of 878261421 is about 29635.4757174573. The cubic root of 878261421 is about 957.6524749058.

The spelling of 878261421 in words is "eight hundred seventy-eight million, two hundred sixty-one thousand, four hundred twenty-one".