161871426 has 16 divisors (see below), whose sum is σ = 359714400. Its totient is φ = 53957124.

The previous prime is 161871371. The next prime is 161871427. The reversal of 161871426 is 624178161.

It is a happy number.

161871426 is a `hidden beast` number, since 1 + 618 + 7 + 14 + 26 = 666.

161871426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (161871427) 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, 1498756 + ... + 1498863.

It is an arithmetic number, because the mean of its divisors is an integer number (22482150).

Almost surely, 2^161871426 is an apocalyptic number.

161871426 is an abundant number, since it is smaller than the sum of its proper divisors (197842974).

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

161871426 is a wasteful number, since it uses less digits than its factorization.

161871426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997630 (or 2997624 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 161871426 is about 12722.8701950464. The cubic root of 161871426 is about 544.9919208745.

The spelling of 161871426 in words is "one hundred sixty-one million, eight hundred seventy-one thousand, four hundred twenty-six".