142501181 has 2 divisors, whose sum is σ = 142501182. Its totient is φ = 142501180.

The previous prime is 142501129. The next prime is 142501187. The reversal of 142501181 is 181105241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130188100 + 12313081 = 11410^2 + 3509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142501181 is a prime.

It is a super-2 number, since 2×142501181² = 40613173172789522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142501187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71250590 + 71250591.

It is an arithmetic number, because the mean of its divisors is an integer number (71250591).

Almost surely, 2^142501181 is an apocalyptic number.

It is an amenable number.

142501181 is a deficient number, since it is larger than the sum of its proper divisors (1).

142501181 is an equidigital number, since it uses as much as digits as its factorization.

142501181 is an evil number, because the sum of its binary digits is even.

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

The square root of 142501181 is about 11937.3858528574. The cubic root of 142501181 is about 522.3234063598.

The spelling of 142501181 in words is "one hundred forty-two million, five hundred one thousand, one hundred eighty-one".