142055581 has 2 divisors, whose sum is σ = 142055582. Its totient is φ = 142055580.

The previous prime is 142055569. The next prime is 142055623. The reversal of 142055581 is 185550241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111640356 + 30415225 = 10566^2 + 5515^2 .

It is a cyclic number.

It is not a de Polignac number, because 142055581 - 2⁵ = 142055549 is a prime.

It is a super-2 number, since 2×142055581² = 40359576186495122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142050581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71027790 + 71027791.

It is an arithmetic number, because the mean of its divisors is an integer number (71027791).

Almost surely, 2^142055581 is an apocalyptic number.

It is an amenable number.

142055581 is a deficient number, since it is larger than the sum of its proper divisors (1).

142055581 is an equidigital number, since it uses as much as digits as its factorization.

142055581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8000, while the sum is 31.

The square root of 142055581 is about 11918.7071866038. The cubic root of 142055581 is about 521.7784042524.

The spelling of 142055581 in words is "one hundred forty-two million, fifty-five thousand, five hundred eighty-one".