142781925457 has 2 divisors, whose sum is σ = 142781925458. Its totient is φ = 142781925456.

The previous prime is 142781925437. The next prime is 142781925491. The reversal of 142781925457 is 754529187241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78229852416 + 64552073041 = 279696^2 + 254071^2 .

It is a cyclic number.

It is not a de Polignac number, because 142781925457 - 2²³ = 142773536849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142781925398 and 142781925407.

It is not a weakly prime, because it can be changed into another prime (142781925437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71390962728 + 71390962729.

It is an arithmetic number, because the mean of its divisors is an integer number (71390962729).

Almost surely, 2^142781925457 is an apocalyptic number.

It is an amenable number.

142781925457 is a deficient number, since it is larger than the sum of its proper divisors (1).

142781925457 is an equidigital number, since it uses as much as digits as its factorization.

142781925457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5644800, while the sum is 55.

The spelling of 142781925457 in words is "one hundred forty-two billion, seven hundred eighty-one million, nine hundred twenty-five thousand, four hundred fifty-seven".