161020507 has 2 divisors, whose sum is σ = 161020508. Its totient is φ = 161020506.

The previous prime is 161020487. The next prime is 161020529. The reversal of 161020507 is 705020161.

It is an a-pointer prime, because the next prime (161020529) can be obtained adding 161020507 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161020507 - 2²⁷ = 26802779 is a prime.

It is not a weakly prime, because it can be changed into another prime (161020537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80510253 + 80510254.

It is an arithmetic number, because the mean of its divisors is an integer number (80510254).

Almost surely, 2^161020507 is an apocalyptic number.

161020507 is a deficient number, since it is larger than the sum of its proper divisors (1).

161020507 is an equidigital number, since it uses as much as digits as its factorization.

161020507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 161020507 is about 12689.3856037241. The cubic root of 161020507 is about 544.0352789891.

Subtracting from 161020507 its sum of digits (22), we obtain a triangular number (161020485 = T₁₇₉₄₅).

Adding to 161020507 its reverse (705020161), we get a palindrome (866040668).

The spelling of 161020507 in words is "one hundred sixty-one million, twenty thousand, five hundred seven".