1257085382 has 16 divisors (see below), whose sum is σ = 2157891072. Its totient is φ = 538029000.

The previous prime is 1257085369. The next prime is 1257085387. The reversal of 1257085382 is 2835807521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257085387) 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 in 7 ways as a sum of consecutive naturals, for example, 49268 + ... + 70295.

It is an arithmetic number, because the mean of its divisors is an integer number (134868192).

Almost surely, 2^1257085382 is an apocalyptic number.

1257085382 is a deficient number, since it is larger than the sum of its proper divisors (900805690).

1257085382 is a wasteful number, since it uses less digits than its factorization.

1257085382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120323.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 1257085382 is about 35455.3998990281. The cubic root of 1257085382 is about 1079.2488438216.

The spelling of 1257085382 in words is "one billion, two hundred fifty-seven million, eighty-five thousand, three hundred eighty-two".