1257120322 has 4 divisors (see below), whose sum is σ = 1885680486. Its totient is φ = 628560160.

The previous prime is 1257120317. The next prime is 1257120329. The reversal of 1257120322 is 2230217521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2230217521 = 7 ⋅318602503.

It can be written as a sum of positive squares in only one way, i.e., 1256773401 + 346921 = 35451^2 + 589^2 .

It is not an unprimeable number, because it can be changed into a prime (1257120329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314280079 + ... + 314280082.

Almost surely, 2^1257120322 is an apocalyptic number.

1257120322 is a deficient number, since it is larger than the sum of its proper divisors (628560164).

1257120322 is an equidigital number, since it uses as much as digits as its factorization.

1257120322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628560163.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1257120322 is about 35455.8926273194. The cubic root of 1257120322 is about 1079.2588427725.

Adding to 1257120322 its reverse (2230217521), we get a palindrome (3487337843).

The spelling of 1257120322 in words is "one billion, two hundred fifty-seven million, one hundred twenty thousand, three hundred twenty-two".