1231245 has 12 divisors (see below), whose sum is σ = 2134236. Its totient is φ = 656640.

The previous prime is 1231231. The next prime is 1231247. The reversal of 1231245 is 5421321.

It can be written as a sum of positive squares in 2 ways, for example, as 594441 + 636804 = 771^2 + 798^2 .

It is not a de Polignac number, because 1231245 - 2⁴ = 1231229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13636 + ... + 13725.

It is an arithmetic number, because the mean of its divisors is an integer number (177853).

2^1231245 is an apocalyptic number.

1231245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1231245 is a deficient number, since it is larger than the sum of its proper divisors (902991).

1231245 is a wasteful number, since it uses less digits than its factorization.

1231245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27372 (or 27369 counting only the distinct ones).

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

The square root of 1231245 is about 1109.6147980268. The cubic root of 1231245 is about 107.1802650331.

Adding to 1231245 its reverse (5421321), we get a palindrome (6652566).

The spelling of 1231245 in words is "one million, two hundred thirty-one thousand, two hundred forty-five".