142471657 has 2 divisors, whose sum is σ = 142471658. Its totient is φ = 142471656.

The previous prime is 142471627. The next prime is 142471669. The reversal of 142471657 is 756174241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130782096 + 11689561 = 11436^2 + 3419^2 .

It is an emirp because it is prime and its reverse (756174241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142471657 - 2¹⁵ = 142438889 is a prime.

It is not a weakly prime, because it can be changed into another prime (142471627) 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, 71235828 + 71235829.

It is an arithmetic number, because the mean of its divisors is an integer number (71235829).

Almost surely, 2^142471657 is an apocalyptic number.

It is an amenable number.

142471657 is a deficient number, since it is larger than the sum of its proper divisors (1).

142471657 is an equidigital number, since it uses as much as digits as its factorization.

142471657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 37.

The square root of 142471657 is about 11936.1491696443. The cubic root of 142471657 is about 522.2873314743.

The spelling of 142471657 in words is "one hundred forty-two million, four hundred seventy-one thousand, six hundred fifty-seven".