142040989 has 2 divisors, whose sum is σ = 142040990. Its totient is φ = 142040988.

The previous prime is 142040963. The next prime is 142041013. The reversal of 142040989 is 989040241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121925764 + 20115225 = 11042^2 + 4485^2 .

It is a cyclic number.

It is not a de Polignac number, because 142040989 - 2⁵ = 142040957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142040929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71020494 + 71020495.

It is an arithmetic number, because the mean of its divisors is an integer number (71020495).

Almost surely, 2^142040989 is an apocalyptic number.

It is an amenable number.

142040989 is a deficient number, since it is larger than the sum of its proper divisors (1).

142040989 is an equidigital number, since it uses as much as digits as its factorization.

142040989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 142040989 is about 11918.0950239541. The cubic root of 142040989 is about 521.7605378860.

The spelling of 142040989 in words is "one hundred forty-two million, forty thousand, nine hundred eighty-nine".