1257141485 has 4 divisors (see below), whose sum is σ = 1508569788. Its totient is φ = 1005713184.

The previous prime is 1257141463. The next prime is 1257141493. The reversal of 1257141485 is 5841417521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5841417521 = 421 ⋅13875101.

It can be written as a sum of positive squares in 2 ways, for example, as 209583529 + 1047557956 = 14477^2 + 32366^2 .

It is a cyclic number.

It is not a de Polignac number, because 1257141485 - 2⁸ = 1257141229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 125714144 + ... + 125714153.

It is an arithmetic number, because the mean of its divisors is an integer number (377142447).

Almost surely, 2^1257141485 is an apocalyptic number.

It is an amenable number.

1257141485 is a deficient number, since it is larger than the sum of its proper divisors (251428303).

1257141485 is an equidigital number, since it uses as much as digits as its factorization.

1257141485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251428302.

The product of its digits is 44800, while the sum is 38.

The square root of 1257141485 is about 35456.1910672875. The cubic root of 1257141485 is about 1079.2648990018.

The spelling of 1257141485 in words is "one billion, two hundred fifty-seven million, one hundred forty-one thousand, four hundred eighty-five".