1245117 has 4 divisors (see below), whose sum is σ = 1660160. Its totient is φ = 830076.

The previous prime is 1245113. The next prime is 1245121. The reversal of 1245117 is 7115421.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (1245113) and next prime (1245121).

It is not a de Polignac number, because 1245117 - 2² = 1245113 is a prime.

It is a D-number.

It is a Duffinian number.

1245117 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1245093 and 1245102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245113) 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, 207517 + ... + 207522.

It is an arithmetic number, because the mean of its divisors is an integer number (415040).

2^1245117 is an apocalyptic number.

It is an amenable number.

1245117 is a deficient number, since it is larger than the sum of its proper divisors (415043).

1245117 is an equidigital number, since it uses as much as digits as its factorization.

1245117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415042.

The product of its digits is 280, while the sum is 21.

The square root of 1245117 is about 1115.8481079430. The cubic root of 1245117 is about 107.5812833952.

The spelling of 1245117 in words is "one million, two hundred forty-five thousand, one hundred seventeen".