1257141228 has 96 divisors (see below), whose sum is σ = 3557159424. Its totient is φ = 337333248.

The previous prime is 1257141187. The next prime is 1257141229. The reversal of 1257141228 is 8221417521.

It is not an unprimeable number, because it can be changed into a prime (1257141229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1260426 + ... + 1261422.

It is an arithmetic number, because the mean of its divisors is an integer number (37053744).

Almost surely, 2^1257141228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1257141228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1778579712).

1257141228 is an abundant number, since it is smaller than the sum of its proper divisors (2300018196).

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

1257141228 is a wasteful number, since it uses less digits than its factorization.

1257141228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911 (or 1909 counting only the distinct ones).

The product of its digits is 8960, while the sum is 33.

The square root of 1257141228 is about 35456.1874430966. The cubic root of 1257141228 is about 1079.2648254564.

Adding to 1257141228 its reverse (8221417521), we get a palindrome (9478558749).

The spelling of 1257141228 in words is "one billion, two hundred fifty-seven million, one hundred forty-one thousand, two hundred twenty-eight".