161542026 has 56 divisors (see below), whose sum is σ = 367234884. Its totient is φ = 53265600.

The previous prime is 161542001. The next prime is 161542027. The reversal of 161542026 is 620245161.

161542026 is a `hidden beast` number, since 1 + 615 + 4 + 20 + 26 = 666.

161542026 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 156275001 + 5267025 = 12501^2 + 2295^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (161542027) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 146710 + ... + 147806.

Almost surely, 2^161542026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161542026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183617442).

161542026 is an abundant number, since it is smaller than the sum of its proper divisors (205692858).

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

161542026 is a wasteful number, since it uses less digits than its factorization.

161542026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218 (or 1203 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 161542026 is about 12709.9184104384. The cubic root of 161542026 is about 544.6219930197.

Adding to 161542026 its reverse (620245161), we get a palindrome (781787187).

The spelling of 161542026 in words is "one hundred sixty-one million, five hundred forty-two thousand, twenty-six".