8161247 has 4 divisors (see below), whose sum is σ = 8211480. Its totient is φ = 8111016.

The previous prime is 8161243. The next prime is 8161249. The reversal of 8161247 is 7421618.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8161247 - 2² = 8161243 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161243) 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, 24872 + ... + 25197.

It is an arithmetic number, because the mean of its divisors is an integer number (2052870).

Almost surely, 2^8161247 is an apocalyptic number.

8161247 is a deficient number, since it is larger than the sum of its proper divisors (50233).

8161247 is a wasteful number, since it uses less digits than its factorization.

8161247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50232.

The product of its digits is 2688, while the sum is 29.

The square root of 8161247 is about 2856.7896317370. The cubic root of 8161247 is about 201.3347967697.

The spelling of 8161247 in words is "eight million, one hundred sixty-one thousand, two hundred forty-seven".