142040531 has 2 divisors, whose sum is σ = 142040532. Its totient is φ = 142040530.

The previous prime is 142040527. The next prime is 142040537. The reversal of 142040531 is 135040241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142040531 - 2² = 142040527 is a prime.

It is a super-2 number, since 2×142040531² = 40351024893523922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (142040537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71020265 + 71020266.

It is an arithmetic number, because the mean of its divisors is an integer number (71020266).

Almost surely, 2^142040531 is an apocalyptic number.

142040531 is a deficient number, since it is larger than the sum of its proper divisors (1).

142040531 is an equidigital number, since it uses as much as digits as its factorization.

142040531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 142040531 is about 11918.0758094585. The cubic root of 142040531 is about 521.7599770935.

Adding to 142040531 its reverse (135040241), we get a palindrome (277080772).

The spelling of 142040531 in words is "one hundred forty-two million, forty thousand, five hundred thirty-one".