161503242 has 32 divisors (see below), whose sum is σ = 336766464. Its totient is φ = 51576000.

The previous prime is 161503241. The next prime is 161503259. The reversal of 161503242 is 242305161.

It is not an unprimeable number, because it can be changed into a prime (161503241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14488 + ... + 23084.

It is an arithmetic number, because the mean of its divisors is an integer number (10523952).

Almost surely, 2^161503242 is an apocalyptic number.

161503242 is an abundant number, since it is smaller than the sum of its proper divisors (175263222).

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

161503242 is a wasteful number, since it uses less digits than its factorization.

161503242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8734.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 161503242 is about 12708.3925812827. The cubic root of 161503242 is about 544.5784041355.

The spelling of 161503242 in words is "one hundred sixty-one million, five hundred three thousand, two hundred forty-two".