142151081 has 4 divisors (see below), whose sum is σ = 142175172. Its totient is φ = 142126992.

The previous prime is 142151057. The next prime is 142151083. The reversal of 142151081 is 180151241.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 47886400 + 94264681 = 6920^2 + 9709^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142151081 is a prime.

It is a super-2 number, since 2×142151081² = 40413859658937122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142151083) 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 3 ways as a sum of consecutive naturals, for example, 3455 + ... + 17211.

It is an arithmetic number, because the mean of its divisors is an integer number (35543793).

Almost surely, 2^142151081 is an apocalyptic number.

It is an amenable number.

142151081 is a deficient number, since it is larger than the sum of its proper divisors (24091).

142151081 is a wasteful number, since it uses less digits than its factorization.

142151081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24090.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 142151081 is about 11922.7128204952. The cubic root of 142151081 is about 521.8953037435.

The spelling of 142151081 in words is "one hundred forty-two million, one hundred fifty-one thousand, eighty-one".