1297951 has 8 divisors (see below), whose sum is σ = 1336608. Its totient is φ = 1260000.

The previous prime is 1297927. The next prime is 1297963. The reversal of 1297951 is 1597921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1297951 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297451) 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 in 7 ways as a sum of consecutive naturals, for example, 7081 + ... + 7261.

It is an arithmetic number, because the mean of its divisors is an integer number (167076).

2^1297951 is an apocalyptic number.

1297951 is the 510-th centered decagonal number.

1297951 is a deficient number, since it is larger than the sum of its proper divisors (38657).

1297951 is a wasteful number, since it uses less digits than its factorization.

1297951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353.

The product of its digits is 5670, while the sum is 34.

The square root of 1297951 is about 1139.2765248174. The cubic root of 1297951 is about 109.0819180511.

The spelling of 1297951 in words is "one million, two hundred ninety-seven thousand, nine hundred fifty-one".