1257178970 has 16 divisors (see below), whose sum is σ = 2324082888. Its totient is φ = 489280320.

The previous prime is 1257178927. The next prime is 1257178973. The reversal of 1257178970 is 798717521.

It can be written as a sum of positive squares in 4 ways, for example, as 1253230801 + 3948169 = 35401^2 + 1987^2 .

It is a super-2 number, since 2×1257178970² = 3160997925220521800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1257178973) 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, 1698521 + ... + 1699260.

Almost surely, 2^1257178970 is an apocalyptic number.

1257178970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1257178970 is a deficient number, since it is larger than the sum of its proper divisors (1066903918).

1257178970 is a wasteful number, since it uses less digits than its factorization.

1257178970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3397825.

The product of its (nonzero) digits is 246960, while the sum is 47.

The square root of 1257178970 is about 35456.7196734272. The cubic root of 1257178970 is about 1079.2756259415.

The spelling of 1257178970 in words is "one billion, two hundred fifty-seven million, one hundred seventy-eight thousand, nine hundred seventy".