1297791454 has 4 divisors (see below), whose sum is σ = 1946687184. Its totient is φ = 648895726.

The previous prime is 1297791449. The next prime is 1297791457. The reversal of 1297791454 is 4541977921.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1297791398 and 1297791407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297791457) 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 as a sum of consecutive naturals, namely, 324447862 + ... + 324447865.

It is an arithmetic number, because the mean of its divisors is an integer number (486671796).

Almost surely, 2^1297791454 is an apocalyptic number.

1297791454 is a deficient number, since it is larger than the sum of its proper divisors (648895730).

1297791454 is an equidigital number, since it uses as much as digits as its factorization.

1297791454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648895729.

The product of its digits is 635040, while the sum is 49.

The square root of 1297791454 is about 36024.8727131686. The cubic root of 1297791454 is about 1090.7744836596.

The spelling of 1297791454 in words is "one billion, two hundred ninety-seven million, seven hundred ninety-one thousand, four hundred fifty-four".