161463421 has 4 divisors (see below), whose sum is σ = 184529632. Its totient is φ = 138397212.

The previous prime is 161463391. The next prime is 161463451. The reversal of 161463421 is 124364161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (161463391) and next prime (161463451).

It is a cyclic number.

It is not a de Polignac number, because 161463421 - 2⁷ = 161463293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161463421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161463451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11533095 + ... + 11533108.

It is an arithmetic number, because the mean of its divisors is an integer number (46132408).

Almost surely, 2^161463421 is an apocalyptic number.

It is an amenable number.

161463421 is a deficient number, since it is larger than the sum of its proper divisors (23066211).

161463421 is an equidigital number, since it uses as much as digits as its factorization.

161463421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23066210.

The product of its digits is 3456, while the sum is 28.

The square root of 161463421 is about 12706.8257641317. The cubic root of 161463421 is about 544.5336425177.

The spelling of 161463421 in words is "one hundred sixty-one million, four hundred sixty-three thousand, four hundred twenty-one".