1245653 has 4 divisors (see below), whose sum is σ = 1253280. Its totient is φ = 1238028.

The previous prime is 1245649. The next prime is 1245683. The reversal of 1245653 is 3565421.

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: 3565421 = 149 ⋅23929.

It is a cyclic number.

It is not a de Polignac number, because 1245653 - 2² = 1245649 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 (1245613) 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, 3563 + ... + 3896.

It is an arithmetic number, because the mean of its divisors is an integer number (313320).

2^1245653 is an apocalyptic number.

It is an amenable number.

1245653 is a deficient number, since it is larger than the sum of its proper divisors (7627).

1245653 is an equidigital number, since it uses as much as digits as its factorization.

1245653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7626.

The product of its digits is 3600, while the sum is 26.

The square root of 1245653 is about 1116.0882581588. The cubic root of 1245653 is about 107.5967184361.

The spelling of 1245653 in words is "one million, two hundred forty-five thousand, six hundred fifty-three".