161502140 has 12 divisors (see below), whose sum is σ = 339154536. Its totient is φ = 64600848.

The previous prime is 161502127. The next prime is 161502163. The reversal of 161502140 is 41205161.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 8075107 = 161502140 / (1 + 6 + 1 + 5 + 0 + 2 + 1 + 4 + 0).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4037534 + ... + 4037573.

It is an arithmetic number, because the mean of its divisors is an integer number (28262878).

Almost surely, 2^161502140 is an apocalyptic number.

161502140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161502140 is an abundant number, since it is smaller than the sum of its proper divisors (177652396).

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

161502140 is a wasteful number, since it uses less digits than its factorization.

161502140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8075116 (or 8075114 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 161502140 is about 12708.3492240338. The cubic root of 161502140 is about 544.5771655086.

The spelling of 161502140 in words is "one hundred sixty-one million, five hundred two thousand, one hundred forty".