161445042 has 64 divisors (see below), whose sum is σ = 393707520. Its totient is φ = 48632400.

The previous prime is 161445041. The next prime is 161445103. The reversal of 161445042 is 240544161.

161445042 is a `hidden beast` number, since 1 + 614 + 4 + 5 + 0 + 42 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 161444997 and 161445015.

It is not an unprimeable number, because it can be changed into a prime (161445041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112743 + ... + 114165.

It is an arithmetic number, because the mean of its divisors is an integer number (6151680).

Almost surely, 2^161445042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161445042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196853760).

161445042 is an abundant number, since it is smaller than the sum of its proper divisors (232262478).

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

161445042 is a wasteful number, since it uses less digits than its factorization.

161445042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636 (or 1630 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 161445042 is about 12706.1025495626. The cubic root of 161445042 is about 544.5129807407.

It can be divided in two parts, 1614 and 45042, that added together give a 6-th power (46656 = 6⁶).

The spelling of 161445042 in words is "one hundred sixty-one million, four hundred forty-five thousand, forty-two".