8159421 has 8 divisors (see below), whose sum is σ = 11057824. Its totient is φ = 5350320.

The previous prime is 8159419. The next prime is 8159423. The reversal of 8159421 is 1249518.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8159419) and next prime (8159423).

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

It is not a de Polignac number, because 8159421 - 2¹ = 8159419 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8159423) 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, 22111 + ... + 22476.

It is an arithmetic number, because the mean of its divisors is an integer number (1382228).

Almost surely, 2^8159421 is an apocalyptic number.

It is an amenable number.

8159421 is a deficient number, since it is larger than the sum of its proper divisors (2898403).

8159421 is a wasteful number, since it uses less digits than its factorization.

8159421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44651.

The product of its digits is 2880, while the sum is 30.

The square root of 8159421 is about 2856.4700243482. The cubic root of 8159421 is about 201.3197800792.

Subtracting from 8159421 its reverse (1249518), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 8159421 in words is "eight million, one hundred fifty-nine thousand, four hundred twenty-one".