1297945 has 8 divisors (see below), whose sum is σ = 1699200. Its totient is φ = 943920.

The previous prime is 1297927. The next prime is 1297963. The reversal of 1297945 is 5497921.

It is an interprime number because it is at equal distance from previous prime (1297927) and next prime (1297963).

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

It is not a de Polignac number, because 1297945 - 2¹³ = 1289753 is a prime.

It is a super-3 number, since 3×1297945³ = 6559792833357550875, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11745 + ... + 11854.

It is an arithmetic number, because the mean of its divisors is an integer number (212400).

2^1297945 is an apocalyptic number.

It is an amenable number.

1297945 is a deficient number, since it is larger than the sum of its proper divisors (401255).

1297945 is a wasteful number, since it uses less digits than its factorization.

1297945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23615.

The product of its digits is 22680, while the sum is 37.

The square root of 1297945 is about 1139.2738915643. The cubic root of 1297945 is about 109.0817499676.

The spelling of 1297945 in words is "one million, two hundred ninety-seven thousand, nine hundred forty-five".