40620161 has 4 divisors (see below), whose sum is σ = 40833024. Its totient is φ = 40407300.

The previous prime is 40620133. The next prime is 40620169. The reversal of 40620161 is 16102604.

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 a de Polignac number, because none of the positive numbers 2^k-40620161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40620169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106145 + ... + 106526.

It is an arithmetic number, because the mean of its divisors is an integer number (10208256).

Almost surely, 2^40620161 is an apocalyptic number.

It is an amenable number.

40620161 is a deficient number, since it is larger than the sum of its proper divisors (212863).

40620161 is a wasteful number, since it uses less digits than its factorization.

40620161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212862.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 40620161 is about 6373.3947782952. The cubic root of 40620161 is about 343.7535670814.

Adding to 40620161 its reverse (16102604), we get a palindrome (56722765).

The spelling of 40620161 in words is "forty million, six hundred twenty thousand, one hundred sixty-one".