161437 has 4 divisors (see below), whose sum is σ = 168480. Its totient is φ = 154396.

The previous prime is 161411. The next prime is 161453. The reversal of 161437 is 734161.

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 161437 - 2⁷ = 161309 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

161437 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161407) 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, 3487 + ... + 3532.

It is an arithmetic number, because the mean of its divisors is an integer number (42120).

2¹⁶¹⁴³⁷ is an apocalyptic number.

It is an amenable number.

161437 is a deficient number, since it is larger than the sum of its proper divisors (7043).

161437 is an equidigital number, since it uses as much as digits as its factorization.

161437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7042.

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

The square root of 161437 is about 401.7922348677. The cubic root of 161437 is about 54.4503939385.

Adding to 161437 its reverse (734161), we get a palindrome (895598).

The spelling of 161437 in words is "one hundred sixty-one thousand, four hundred thirty-seven".