161211426 has 16 divisors (see below), whose sum is σ = 330287328. Its totient is φ = 52426400.

The previous prime is 161211419. The next prime is 161211433. The reversal of 161211426 is 624112161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (161211419) and next prime (161211433).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161211396 and 161211405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327420 + ... + 327911.

It is an arithmetic number, because the mean of its divisors is an integer number (20642958).

Almost surely, 2^161211426 is an apocalyptic number.

161211426 is an abundant number, since it is smaller than the sum of its proper divisors (169075902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161211426 is a wasteful number, since it uses less digits than its factorization.

161211426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655377.

The product of its digits is 576, while the sum is 24.

The square root of 161211426 is about 12696.9061585884. The cubic root of 161211426 is about 544.2502115453.

Adding to 161211426 its reverse (624112161), we get a palindrome (785323587).

The spelling of 161211426 in words is "one hundred sixty-one million, two hundred eleven thousand, four hundred twenty-six".