1297405 has 8 divisors (see below), whose sum is σ = 1599192. Its totient is φ = 1009728.

The previous prime is 1297403. The next prime is 1297411. The reversal of 1297405 is 5047921.

1297405 = T₉₄ + T₉₅ + ... + T₂₀₄.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 586756 + 710649 = 766^2 + 843^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1297405 - 2¹ = 1297403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3322 + ... + 3691.

It is an arithmetic number, because the mean of its divisors is an integer number (199899).

2^1297405 is an apocalyptic number.

It is an amenable number.

1297405 is a deficient number, since it is larger than the sum of its proper divisors (301787).

1297405 is an equidigital number, since it uses as much as digits as its factorization.

1297405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7055.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 1297405 is about 1139.0368738544. The cubic root of 1297405 is about 109.0666203291.

The spelling of 1297405 in words is "one million, two hundred ninety-seven thousand, four hundred five".