142161505 has 16 divisors (see below), whose sum is σ = 183757824. Its totient is φ = 105272640.

The previous prime is 142161499. The next prime is 142161533. The reversal of 142161505 is 505161241.

It is a happy number.

It is not a de Polignac number, because 142161505 - 2¹⁷ = 142030433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142161505.

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 15 ways as a sum of consecutive naturals, for example, 16374 + ... + 23503.

It is an arithmetic number, because the mean of its divisors is an integer number (11484864).

Almost surely, 2^142161505 is an apocalyptic number.

It is an amenable number.

142161505 is a deficient number, since it is larger than the sum of its proper divisors (41596319).

142161505 is a wasteful number, since it uses less digits than its factorization.

142161505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39936.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 142161505 is about 11923.1499613148. The cubic root of 142161505 is about 521.9080603675.

It can be divided in two parts, 1421 and 61505, that added together give a palindrome (62926).

The spelling of 142161505 in words is "one hundred forty-two million, one hundred sixty-one thousand, five hundred five".