142189057 has 2 divisors, whose sum is σ = 142189058. Its totient is φ = 142189056.

The previous prime is 142189009. The next prime is 142189063. The reversal of 142189057 is 750981241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134768881 + 7420176 = 11609^2 + 2724^2 .

It is a cyclic number.

It is not a de Polignac number, because 142189057 - 2⁷ = 142188929 is a prime.

It is not a weakly prime, because it can be changed into another prime (142183057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71094528 + 71094529.

It is an arithmetic number, because the mean of its divisors is an integer number (71094529).

Almost surely, 2^142189057 is an apocalyptic number.

It is an amenable number.

142189057 is a deficient number, since it is larger than the sum of its proper divisors (1).

142189057 is an equidigital number, since it uses as much as digits as its factorization.

142189057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 142189057 is about 11924.3053047127. The cubic root of 142189057 is about 521.9417747968.

The spelling of 142189057 in words is "one hundred forty-two million, one hundred eighty-nine thousand, fifty-seven".