1297605423 has 4 divisors (see below), whose sum is σ = 1730140568. Its totient is φ = 865070280.

The previous prime is 1297605373. The next prime is 1297605431. The reversal of 1297605423 is 3245067921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3245067921 = 3 ⋅1081689307.

It is not a de Polignac number, because 1297605423 - 2⁸ = 1297605167 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 (1297605523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216267568 + ... + 216267573.

It is an arithmetic number, because the mean of its divisors is an integer number (432535142).

Almost surely, 2^1297605423 is an apocalyptic number.

1297605423 is a deficient number, since it is larger than the sum of its proper divisors (432535145).

1297605423 is an equidigital number, since it uses as much as digits as its factorization.

1297605423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432535144.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 1297605423 is about 36022.2906406575. The cubic root of 1297605423 is about 1090.7223624029.

The spelling of 1297605423 in words is "one billion, two hundred ninety-seven million, six hundred five thousand, four hundred twenty-three".