1297672546 has 4 divisors (see below), whose sum is σ = 1946508822. Its totient is φ = 648836272.

The previous prime is 1297672531. The next prime is 1297672553. The reversal of 1297672546 is 6452767921.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 776235321 + 521437225 = 27861^2 + 22835^2 .

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 a self number, because there is not a number n which added to its sum of digits gives 1297672546.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324418135 + ... + 324418138.

Almost surely, 2^1297672546 is an apocalyptic number.

1297672546 is a deficient number, since it is larger than the sum of its proper divisors (648836276).

1297672546 is an equidigital number, since it uses as much as digits as its factorization.

1297672546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648836275.

The product of its digits is 1270080, while the sum is 49.

The square root of 1297672546 is about 36023.2223156119. Note that the first 3 decimals coincide. The cubic root of 1297672546 is about 1090.7411691715.

The spelling of 1297672546 in words is "one billion, two hundred ninety-seven million, six hundred seventy-two thousand, five hundred forty-six".