1245845 has 8 divisors (see below), whose sum is σ = 1583064. Its totient is φ = 937984.

The previous prime is 1245833. The next prime is 1245847. The reversal of 1245845 is 5485421.

It can be written as a sum of positive squares in 4 ways, for example, as 677329 + 568516 = 823^2 + 754^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1245845 - 2⁶ = 1245781 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 (1245847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7244 + ... + 7413.

It is an arithmetic number, because the mean of its divisors is an integer number (197883).

2^1245845 is an apocalyptic number.

It is an amenable number.

1245845 is a deficient number, since it is larger than the sum of its proper divisors (337219).

1245845 is a wasteful number, since it uses less digits than its factorization.

1245845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14679.

The product of its digits is 6400, while the sum is 29.

The square root of 1245845 is about 1116.1742695475. The cubic root of 1245845 is about 107.6022463289.

The spelling of 1245845 in words is "one million, two hundred forty-five thousand, eight hundred forty-five".