1243297 has 4 divisors (see below), whose sum is σ = 1356336. Its totient is φ = 1130260.

The previous prime is 1243273. The next prime is 1243309. The reversal of 1243297 is 7923421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7923421 = 11 ⋅720311.

It is a cyclic number.

It is not a de Polignac number, because 1243297 - 2⁷ = 1243169 is a prime.

It is a Duffinian number.

1243297 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1243097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56503 + ... + 56524.

It is an arithmetic number, because the mean of its divisors is an integer number (339084).

2^1243297 is an apocalyptic number.

It is an amenable number.

1243297 is a deficient number, since it is larger than the sum of its proper divisors (113039).

1243297 is a wasteful number, since it uses less digits than its factorization.

1243297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113038.

The product of its digits is 3024, while the sum is 28.

The square root of 1243297 is about 1115.0322865281. The cubic root of 1243297 is about 107.5288402879.

It can be divided in two parts, 1243 and 297, that added together give a triangular number (1540 = T₅₅).

The spelling of 1243297 in words is "one million, two hundred forty-three thousand, two hundred ninety-seven".