1257171048 has 144 divisors (see below), whose sum is σ = 4053329280. Its totient is φ = 350796096.

The previous prime is 1257171031. The next prime is 1257171059. The reversal of 1257171048 is 8401717521.

1257171048 is a `hidden beast` number, since 12 + 571 + 71 + 0 + 4 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 147561 + ... + 155847.

It is an arithmetic number, because the mean of its divisors is an integer number (28148120).

Almost surely, 2^1257171048 is an apocalyptic number.

1257171048 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1257171048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2026664640).

1257171048 is an abundant number, since it is smaller than the sum of its proper divisors (2796158232).

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

1257171048 is a wasteful number, since it uses less digits than its factorization.

1257171048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8356 (or 8342 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 36.

The square root of 1257171048 is about 35456.6079595891. The cubic root of 1257171048 is about 1079.2733589507.

Adding to 1257171048 its reverse (8401717521), we get a palindrome (9658888569).

The spelling of 1257171048 in words is "one billion, two hundred fifty-seven million, one hundred seventy-one thousand, forty-eight".