161281435 has 16 divisors (see below), whose sum is σ = 222146496. Its totient is φ = 110112768.

The previous prime is 161281429. The next prime is 161281447. The reversal of 161281435 is 534182161.

It is a cyclic number.

It is not a de Polignac number, because 161281435 - 2⁵ = 161281403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161281397 and 161281406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1734 + ... + 18043.

It is an arithmetic number, because the mean of its divisors is an integer number (13884156).

Almost surely, 2^161281435 is an apocalyptic number.

161281435 is a deficient number, since it is larger than the sum of its proper divisors (60865061).

161281435 is a wasteful number, since it uses less digits than its factorization.

161281435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20022.

The product of its digits is 5760, while the sum is 31.

The square root of 161281435 is about 12699.6627907988. The cubic root of 161281435 is about 544.3289836683.

The spelling of 161281435 in words is "one hundred sixty-one million, two hundred eighty-one thousand, four hundred thirty-five".