1212913 has 6 divisors (see below), whose sum is σ = 1313574. Its totient is φ = 1119456.

The previous prime is 1212907. The next prime is 1212917. The reversal of 1212913 is 3192121.

It can be written as a sum of positive squares in 3 ways, for example, as 82944 + 1129969 = 288^2 + 1063^2 .

It is not a de Polignac number, because 1212913 - 2⁹ = 1212401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3420 + ... + 3757.

It is an arithmetic number, because the mean of its divisors is an integer number (218929).

2^1212913 is an apocalyptic number.

1212913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1212913 is a deficient number, since it is larger than the sum of its proper divisors (100661).

1212913 is an equidigital number, since it uses as much as digits as its factorization.

1212913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7203 (or 7190 counting only the distinct ones).

The product of its digits is 108, while the sum is 19.

The square root of 1212913 is about 1101.3232949502. The cubic root of 1212913 is about 106.6456675242.

The spelling of 1212913 in words is "one million, two hundred twelve thousand, nine hundred thirteen".