142847531 has 2 divisors, whose sum is σ = 142847532. Its totient is φ = 142847530.

The previous prime is 142847519. The next prime is 142847609. The reversal of 142847531 is 135748241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142847531 - 2¹⁴ = 142831147 is a prime.

It is a super-2 number, since 2×142847531² = 40810834225591922, which contains 22 as substring.

It is equal to p_8063891 and since 142847531 and 8063891 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 142847491 and 142847500.

It is not a weakly prime, because it can be changed into another prime (142847501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71423765 + 71423766.

It is an arithmetic number, because the mean of its divisors is an integer number (71423766).

Almost surely, 2^142847531 is an apocalyptic number.

142847531 is a deficient number, since it is larger than the sum of its proper divisors (1).

142847531 is an equidigital number, since it uses as much as digits as its factorization.

142847531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 35.

The square root of 142847531 is about 11951.8839937476. The cubic root of 142847531 is about 522.7462340705.

The spelling of 142847531 in words is "one hundred forty-two million, eight hundred forty-seven thousand, five hundred thirty-one".