1257281017102 has 16 divisors (see below), whose sum is σ = 2077738930224. Its totient is φ = 565833040000.

The previous prime is 1257281017051. The next prime is 1257281017117. The reversal of 1257281017102 is 2017101827521.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282914299 + ... + 282918742.

It is an arithmetic number, because the mean of its divisors is an integer number (129858683139).

Almost surely, 2^{1257281017102} is an apocalyptic number.

1257281017102 is a deficient number, since it is larger than the sum of its proper divisors (820457913122).

1257281017102 is a wasteful number, since it uses less digits than its factorization.

1257281017102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565833155.

The product of its (nonzero) digits is 15680, while the sum is 37.

The spelling of 1257281017102 in words is "one trillion, two hundred fifty-seven billion, two hundred eighty-one million, seventeen thousand, one hundred two".