1213725 has 12 divisors (see below), whose sum is σ = 2006816. Its totient is φ = 647280.

The previous prime is 1213721. The next prime is 1213741. The reversal of 1213725 is 5273121.

It is not a de Polignac number, because 1213725 - 2² = 1213721 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 (1213721) 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, 8017 + ... + 8166.

2^1213725 is an apocalyptic number.

1213725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1213725 is a deficient number, since it is larger than the sum of its proper divisors (793091).

1213725 is a wasteful number, since it uses less digits than its factorization.

1213725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16196 (or 16191 counting only the distinct ones).

The product of its digits is 420, while the sum is 21.

The square root of 1213725 is about 1101.6918806999. The cubic root of 1213725 is about 106.6694606473.

Adding to 1213725 its reverse (5273121), we get a palindrome (6486846).

The spelling of 1213725 in words is "one million, two hundred thirteen thousand, seven hundred twenty-five".