161280465 has 8 divisors (see below), whose sum is σ = 258048768. Its totient is φ = 86016240.

The previous prime is 161280463. The next prime is 161280467. The reversal of 161280465 is 564082161.

It is an interprime number because it is at equal distance from previous prime (161280463) and next prime (161280467).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161280465 - 2¹ = 161280463 is a prime.

It is a super-2 number, since 2×161280465² = 52022776781232450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161280463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5376001 + ... + 5376030.

It is an arithmetic number, because the mean of its divisors is an integer number (32256096).

Almost surely, 2^161280465 is an apocalyptic number.

161280465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161280465 is a deficient number, since it is larger than the sum of its proper divisors (96768303).

161280465 is a wasteful number, since it uses less digits than its factorization.

161280465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10752039.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 161280465 is about 12699.6246007510. The cubic root of 161280465 is about 544.3278924078.

The spelling of 161280465 in words is "one hundred sixty-one million, two hundred eighty thousand, four hundred sixty-five".