1297455682 has 4 divisors (see below), whose sum is σ = 1946183526. Its totient is φ = 648727840.

The previous prime is 1297455673. The next prime is 1297455683. The reversal of 1297455682 is 2865547921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2865547921 = 587 ⋅4881683.

It can be written as a sum of positive squares in only one way, i.e., 1204159401 + 93296281 = 34701^2 + 9659^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1297455683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324363919 + ... + 324363922.

Almost surely, 2^1297455682 is an apocalyptic number.

1297455682 is a deficient number, since it is larger than the sum of its proper divisors (648727844).

1297455682 is an equidigital number, since it uses as much as digits as its factorization.

1297455682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648727843.

The product of its digits is 1209600, while the sum is 49.

The square root of 1297455682 is about 36020.2121315242. The cubic root of 1297455682 is about 1090.6804050823.

The spelling of 1297455682 in words is "one billion, two hundred ninety-seven million, four hundred fifty-five thousand, six hundred eighty-two".