142489931 has 2 divisors, whose sum is σ = 142489932. Its totient is φ = 142489930.

The previous prime is 142489913. The next prime is 142489933. The reversal of 142489931 is 139984241.

Together with previous prime (142489913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (139984241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142489931 - 2¹⁴ = 142473547 is a prime.

It is a super-2 number, since 2×142489931² = 40606760872769522, which contains 22 as substring.

Together with 142489933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142489933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71244965 + 71244966.

It is an arithmetic number, because the mean of its divisors is an integer number (71244966).

Almost surely, 2^142489931 is an apocalyptic number.

142489931 is a deficient number, since it is larger than the sum of its proper divisors (1).

142489931 is an equidigital number, since it uses as much as digits as its factorization.

142489931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 142489931 is about 11936.9146348627. The cubic root of 142489931 is about 522.3096607592.

The spelling of 142489931 in words is "one hundred forty-two million, four hundred eighty-nine thousand, nine hundred thirty-one".