8261421 has 8 divisors (see below), whose sum is σ = 12588864. Its totient is φ = 4720800.

The previous prime is 8261419. The next prime is 8261441. The reversal of 8261421 is 1241628.

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

It is not a de Polignac number, because 8261421 - 2¹ = 8261419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8261391 and 8261400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8261411) 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, 196680 + ... + 196721.

It is an arithmetic number, because the mean of its divisors is an integer number (1573608).

Almost surely, 2^8261421 is an apocalyptic number.

It is an amenable number.

8261421 is a deficient number, since it is larger than the sum of its proper divisors (4327443).

8261421 is a wasteful number, since it uses less digits than its factorization.

8261421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393411.

The product of its digits is 768, while the sum is 24.

The square root of 8261421 is about 2874.2687765761. The cubic root of 8261421 is about 202.1552004659.

The spelling of 8261421 in words is "eight million, two hundred sixty-one thousand, four hundred twenty-one".