1257501555140 has 12 divisors (see below), whose sum is σ = 2640753265836. Its totient is φ = 503000622048.

The previous prime is 1257501555127. The next prime is 1257501555217. The reversal of 1257501555140 is 415551057521.

It can be written as a sum of positive squares in 2 ways, for example, as 172004290756 + 1085497264384 = 414734^2 + 1041872^2 .

It is a super-2 number, since 2×1257501555140² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31437538859 + ... + 31437538898.

It is an arithmetic number, because the mean of its divisors is an integer number (220062772153).

Almost surely, 2^{1257501555140} is an apocalyptic number.

1257501555140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1257501555140 is an abundant number, since it is smaller than the sum of its proper divisors (1383251710696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1257501555140 is a wasteful number, since it uses less digits than its factorization.

1257501555140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62875077766 (or 62875077764 counting only the distinct ones).

The product of its (nonzero) digits is 175000, while the sum is 41.

The spelling of 1257501555140 in words is "one trillion, two hundred fifty-seven billion, five hundred one million, five hundred fifty-five thousand, one hundred forty".