142349257 has 2 divisors, whose sum is σ = 142349258. Its totient is φ = 142349256.

The previous prime is 142349243. The next prime is 142349267. The reversal of 142349257 is 752943241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128391561 + 13957696 = 11331^2 + 3736^2 .

It is an emirp because it is prime and its reverse (752943241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142349257 is a prime.

It is not a weakly prime, because it can be changed into another prime (142349237) 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, 71174628 + 71174629.

It is an arithmetic number, because the mean of its divisors is an integer number (71174629).

Almost surely, 2^142349257 is an apocalyptic number.

It is an amenable number.

142349257 is a deficient number, since it is larger than the sum of its proper divisors (1).

142349257 is an equidigital number, since it uses as much as digits as its factorization.

142349257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 37.

The square root of 142349257 is about 11931.0207861691. The cubic root of 142349257 is about 522.1377197627.

The spelling of 142349257 in words is "one hundred forty-two million, three hundred forty-nine thousand, two hundred fifty-seven".