161542745 has 16 divisors (see below), whose sum is σ = 238586880. Its totient is φ = 102250944.

The previous prime is 161542741. The next prime is 161542751. The reversal of 161542745 is 547245161.

It is a cyclic number.

It is not a de Polignac number, because 161542745 - 2² = 161542741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (161542741) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 177065 + ... + 177974.

It is an arithmetic number, because the mean of its divisors is an integer number (14911680).

Almost surely, 2^161542745 is an apocalyptic number.

It is an amenable number.

161542745 is a deficient number, since it is larger than the sum of its proper divisors (77044135).

161542745 is a wasteful number, since it uses less digits than its factorization.

161542745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355064.

The product of its digits is 33600, while the sum is 35.

The square root of 161542745 is about 12709.9466954036. The cubic root of 161542745 is about 544.6228010295.

The spelling of 161542745 in words is "one hundred sixty-one million, five hundred forty-two thousand, seven hundred forty-five".