Search a number
-
+
8149421 = 71164203
BaseRepresentation
bin11111000101100110101101
3120100000220102
4133011212231
54041240141
6450400445
7126161150
oct37054655
916300812
108149421
114666865
122890125
1318c4457
141121c97
15aae99b
hex7c59ad

8149421 has 4 divisors (see below), whose sum is σ = 9313632. Its totient is φ = 6985212.

The previous prime is 8149381. The next prime is 8149457. The reversal of 8149421 is 1249418.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1249418 = 2624709.

It is a cyclic number.

It is not a de Polignac number, because 8149421 - 222 = 3955117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8149481) 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, 582095 + ... + 582108.

It is an arithmetic number, because the mean of its divisors is an integer number (2328408).

Almost surely, 28149421 is an apocalyptic number.

It is an amenable number.

8149421 is a deficient number, since it is larger than the sum of its proper divisors (1164211).

8149421 is a wasteful number, since it uses less digits than its factorization.

8149421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164210.

The product of its digits is 2304, while the sum is 29.

The square root of 8149421 is about 2854.7190754959. The cubic root of 8149421 is about 201.2375021494.

The spelling of 8149421 in words is "eight million, one hundred forty-nine thousand, four hundred twenty-one".

Divisors: 1 7 1164203 8149421