161754642 has 24 divisors (see below), whose sum is σ = 400535616. Its totient is φ = 46215576.

The previous prime is 161754629. The next prime is 161754647. The reversal of 161754642 is 246457161.

161754642 is a `hidden beast` number, since 1 + 6 + 1 + 7 + 5 + 4 + 642 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 161754597 and 161754606.

It is not an unprimeable number, because it can be changed into a prime (161754647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 641758 + ... + 642009.

It is an arithmetic number, because the mean of its divisors is an integer number (16688984).

Almost surely, 2^161754642 is an apocalyptic number.

161754642 is an abundant number, since it is smaller than the sum of its proper divisors (238780974).

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

161754642 is a wasteful number, since it uses less digits than its factorization.

161754642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283782 (or 1283779 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 161754642 is about 12718.2798365188. The cubic root of 161754642 is about 544.8608257819.

The spelling of 161754642 in words is "one hundred sixty-one million, seven hundred fifty-four thousand, six hundred forty-two".