3642161 has 4 divisors (see below), whose sum is σ = 3678324. Its totient is φ = 3606000.

The previous prime is 3642157. The next prime is 3642203. The reversal of 3642161 is 1612463.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2421136 + 1221025 = 1556^2 + 1105^2 .

It is a cyclic number.

It is not a de Polignac number, because 3642161 - 2² = 3642157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3642101) 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, 17930 + ... + 18131.

It is an arithmetic number, because the mean of its divisors is an integer number (919581).

Almost surely, 2^3642161 is an apocalyptic number.

It is an amenable number.

3642161 is a deficient number, since it is larger than the sum of its proper divisors (36163).

3642161 is a wasteful number, since it uses less digits than its factorization.

3642161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36162.

The product of its digits is 864, while the sum is 23.

The square root of 3642161 is about 1908.4446546861. Note that the first 3 decimals coincide. The cubic root of 3642161 is about 153.8578690886.

The spelling of 3642161 in words is "three million, six hundred forty-two thousand, one hundred sixty-one".