161507 has 2 divisors, whose sum is σ = 161508. Its totient is φ = 161506.

The previous prime is 161503. The next prime is 161521. The reversal of 161507 is 705161.

It is a weak prime.

It is an emirp because it is prime and its reverse (705161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161507 - 2² = 161503 is a prime.

It is a super-2 number, since 2×161507² = 52169022098, which contains 22 as substring.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 161507.

It is not a weakly prime, because it can be changed into another prime (161503) 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 as a sum of consecutive naturals, namely, 80753 + 80754.

It is an arithmetic number, because the mean of its divisors is an integer number (80754).

2¹⁶¹⁵⁰⁷ is an apocalyptic number.

161507 is a deficient number, since it is larger than the sum of its proper divisors (1).

161507 is an equidigital number, since it uses as much as digits as its factorization.

161507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 161507 is about 401.8793351244. The cubic root of 161507 is about 54.4582628013.

Adding to 161507 its reverse (705161), we get a palindrome (866668).

It can be divided in two parts, 16150 and 7, that multiplied together give a triangular number (113050 = T₄₇₅).

The spelling of 161507 in words is "one hundred sixty-one thousand, five hundred seven".