1213261 has 8 divisors (see below), whose sum is σ = 1393344. Its totient is φ = 1034880.

The previous prime is 1213259. The next prime is 1213271. The reversal of 1213261 is 1623121.

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

It is not a de Polignac number, because 1213261 - 2¹ = 1213259 is a prime.

It is a Duffinian number.

1213261 is a lucky 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 7 ways as a sum of consecutive naturals, for example, 2226 + ... + 2716.

It is an arithmetic number, because the mean of its divisors is an integer number (174168).

2^1213261 is an apocalyptic number.

It is an amenable number.

1213261 is a deficient number, since it is larger than the sum of its proper divisors (180083).

1213261 is an equidigital number, since it uses as much as digits as its factorization.

1213261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851.

The product of its digits is 72, while the sum is 16.

The square root of 1213261 is about 1101.4812753742. The cubic root of 1213261 is about 106.6558658769.

Adding to 1213261 its reverse (1623121), we get a palindrome (2836382).

The spelling of 1213261 in words is "one million, two hundred thirteen thousand, two hundred sixty-one".