1305497 has 4 divisors (see below), whose sum is σ = 1311156. Its totient is φ = 1299840.

The previous prime is 1305449. The next prime is 1305511. The reversal of 1305497 is 7945031.

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

It can be written as a sum of positive squares in 2 ways, for example, as 502681 + 802816 = 709^2 + 896^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305497 - 2¹⁶ = 1239961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1305427) 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 3 ways as a sum of consecutive naturals, for example, 2468 + ... + 2949.

It is an arithmetic number, because the mean of its divisors is an integer number (327789).

2^1305497 is an apocalyptic number.

It is an amenable number.

1305497 is a deficient number, since it is larger than the sum of its proper divisors (5659).

1305497 is an equidigital number, since it uses as much as digits as its factorization.

1305497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5658.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 1305497 is about 1142.5834761627. The cubic root of 1305497 is about 109.2929024197.

It can be divided in two parts, 130 and 5497, that multiplied together give a triangular number (714610 = T₁₁₉₅).

The spelling of 1305497 in words is "one million, three hundred five thousand, four hundred ninety-seven".