1245997 has 4 divisors (see below), whose sum is σ = 1255936. Its totient is φ = 1236060.

The previous prime is 1245973. The next prime is 1246013. The reversal of 1245997 is 7995421.

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.

It is a cyclic number.

It is not a de Polignac number, because 1245997 - 2¹⁹ = 721709 is a prime.

It is a Duffinian number.

1245997 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245917) 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, 4779 + ... + 5032.

It is an arithmetic number, because the mean of its divisors is an integer number (313984).

2^1245997 is an apocalyptic number.

It is an amenable number.

1245997 is a deficient number, since it is larger than the sum of its proper divisors (9939).

1245997 is an equidigital number, since it uses as much as digits as its factorization.

1245997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9938.

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

The square root of 1245997 is about 1116.2423571967. The cubic root of 1245997 is about 107.6066221746.

The spelling of 1245997 in words is "one million, two hundred forty-five thousand, nine hundred ninety-seven".