1213245 has 64 divisors (see below), whose sum is σ = 2534400. Its totient is φ = 544320.

The previous prime is 1213241. The next prime is 1213253. The reversal of 1213245 is 5423121.

It is not a de Polignac number, because 1213245 - 2² = 1213241 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28194 + ... + 28236.

It is an arithmetic number, because the mean of its divisors is an integer number (39600).

2^1213245 is an apocalyptic number.

1213245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213245 is an abundant number, since it is smaller than the sum of its proper divisors (1321155).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213245 is a wasteful number, since it uses less digits than its factorization.

1213245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 81 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 1213245 is about 1101.4740124034. The cubic root of 1213245 is about 106.6553970299.

Adding to 1213245 its reverse (5423121), we get a palindrome (6636366).

The spelling of 1213245 in words is "one million, two hundred thirteen thousand, two hundred forty-five".