161219426 has 8 divisors (see below), whose sum is σ = 242188380. Its totient is φ = 80489968.

The previous prime is 161219407. The next prime is 161219431. The reversal of 161219426 is 624912161.

It can be written as a sum of positive squares in 2 ways, for example, as 156375025 + 4844401 = 12505^2 + 2201^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 161219392 and 161219401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58181 + ... + 60888.

Almost surely, 2^161219426 is an apocalyptic number.

161219426 is a deficient number, since it is larger than the sum of its proper divisors (80968954).

161219426 is a wasteful number, since it uses less digits than its factorization.

161219426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119748.

The product of its digits is 5184, while the sum is 32.

The square root of 161219426 is about 12697.2211920562. The cubic root of 161219426 is about 544.2592140703.

The spelling of 161219426 in words is "one hundred sixty-one million, two hundred nineteen thousand, four hundred twenty-six".