1257114771601 has 4 divisors (see below), whose sum is σ = 1353815907892. Its totient is φ = 1160413635312.

The previous prime is 1257114771599. The next prime is 1257114771623. The reversal of 1257114771601 is 1061774117521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 743692365376 + 513422406225 = 862376^2 + 716535^2 .

It is a cyclic number.

It is not a de Polignac number, because 1257114771601 - 2¹ = 1257114771599 is a prime.

It is a super-2 number, since 2×1257114771601² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1257114771401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48350568126 + ... + 48350568151.

It is an arithmetic number, because the mean of its divisors is an integer number (338453976973).

Almost surely, 2^{1257114771601} is an apocalyptic number.

It is an amenable number.

1257114771601 is a deficient number, since it is larger than the sum of its proper divisors (96701136291).

1257114771601 is an equidigital number, since it uses as much as digits as its factorization.

1257114771601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96701136290.

The product of its (nonzero) digits is 82320, while the sum is 43.

The spelling of 1257114771601 in words is "one trillion, two hundred fifty-seven billion, one hundred fourteen million, seven hundred seventy-one thousand, six hundred one".