162878421 has 4 divisors (see below), whose sum is σ = 217171232. Its totient is φ = 108585612.

The previous prime is 162878369. The next prime is 162878437. The reversal of 162878421 is 124878261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 162878421 - 2¹⁵ = 162845653 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 162878421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162878021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27146401 + ... + 27146406.

It is an arithmetic number, because the mean of its divisors is an integer number (54292808).

Almost surely, 2^162878421 is an apocalyptic number.

It is an amenable number.

162878421 is a deficient number, since it is larger than the sum of its proper divisors (54292811).

162878421 is an equidigital number, since it uses as much as digits as its factorization.

162878421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54292810.

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

The square root of 162878421 is about 12762.3830454974. The cubic root of 162878421 is about 546.1197090230.

The spelling of 162878421 in words is "one hundred sixty-two million, eight hundred seventy-eight thousand, four hundred twenty-one".