1257330142249 has 16 divisors (see below), whose sum is σ = 1263602995200. Its totient is φ = 1251075571200.

The previous prime is 1257330142247. The next prime is 1257330142283. The reversal of 1257330142249 is 9422410337521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1257330142249 - 2¹ = 1257330142247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1257330142247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 644453224 + ... + 644455174.

It is an arithmetic number, because the mean of its divisors is an integer number (78975187200).

Almost surely, 2^{1257330142249} is an apocalyptic number.

It is an amenable number.

1257330142249 is a deficient number, since it is larger than the sum of its proper divisors (6272852951).

1257330142249 is a wasteful number, since it uses less digits than its factorization.

1257330142249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5160.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 1257330142249 in words is "one trillion, two hundred fifty-seven billion, three hundred thirty million, one hundred forty-two thousand, two hundred forty-nine".