8161601 has 4 divisors (see below), whose sum is σ = 9327552. Its totient is φ = 6995652.

The previous prime is 8161591. The next prime is 8161607. The reversal of 8161601 is 1061618.

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 a cyclic number.

It is not a de Polignac number, because 8161601 - 2⁶ = 8161537 is a prime.

It is a super-2 number, since 2×8161601² = 133223461766402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8161607) 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, 582965 + ... + 582978.

It is an arithmetic number, because the mean of its divisors is an integer number (2331888).

Almost surely, 2^8161601 is an apocalyptic number.

It is an amenable number.

8161601 is a deficient number, since it is larger than the sum of its proper divisors (1165951).

8161601 is a wasteful number, since it uses less digits than its factorization.

8161601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165950.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 8161601 is about 2856.8515887249. The cubic root of 8161601 is about 201.3377077418.

The spelling of 8161601 in words is "eight million, one hundred sixty-one thousand, six hundred one".