161284049 has 4 divisors (see below), whose sum is σ = 170771364. Its totient is φ = 151796736.

The previous prime is 161284033. The next prime is 161284069. The reversal of 161284049 is 940482161.

It is a happy number.

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 149621824 + 11662225 = 12232^2 + 3415^2 .

It is a cyclic number.

It is not a de Polignac number, because 161284049 - 2⁴ = 161284033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161284069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4743632 + ... + 4743665.

It is an arithmetic number, because the mean of its divisors is an integer number (42692841).

Almost surely, 2^161284049 is an apocalyptic number.

It is an amenable number.

161284049 is a deficient number, since it is larger than the sum of its proper divisors (9487315).

161284049 is an equidigital number, since it uses as much as digits as its factorization.

161284049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9487314.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 161284049 is about 12699.7657065003. The cubic root of 161284049 is about 544.3319244248.

The spelling of 161284049 in words is "one hundred sixty-one million, two hundred eighty-four thousand, forty-nine".