161202037 has 4 divisors (see below), whose sum is σ = 165133836. Its totient is φ = 157270240.

The previous prime is 161202011. The next prime is 161202043. The reversal of 161202037 is 730202161.

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 91412721 + 69789316 = 9561^2 + 8354^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161202037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161201999 and 161202017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161202047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1965838 + ... + 1965919.

It is an arithmetic number, because the mean of its divisors is an integer number (41283459).

Almost surely, 2^161202037 is an apocalyptic number.

It is an amenable number.

161202037 is a deficient number, since it is larger than the sum of its proper divisors (3931799).

161202037 is an equidigital number, since it uses as much as digits as its factorization.

161202037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3931798.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 161202037 is about 12696.5364174644. The cubic root of 161202037 is about 544.2396455771.

Adding to 161202037 its reverse (730202161), we get a palindrome (891404198).

The spelling of 161202037 in words is "one hundred sixty-one million, two hundred two thousand, thirty-seven".