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1213013 = 2295297

1213013 has 4 divisors (see below), whose sum is σ = 1218540. Its totient is φ = 1207488.

The previous prime is 1213007. The next prime is 1213019. The reversal of 1213013 is 3103121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1213007) and next prime (1213019).

It can be written as a sum of positive squares in 2 ways, for example, as 1067089 + 145924 = 1033^2 + 382^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213013 - 218 = 950869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1212985 and 1213003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2420 + ... + 2877.

It is an arithmetic number, because the mean of its divisors is an integer number (304635).

21213013 is an apocalyptic number.

It is an amenable number.

1213013 is a deficient number, since it is larger than the sum of its proper divisors (5527).

1213013 is an equidigital number, since it uses as much as digits as its factorization.

1213013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5526.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1213013 is about 1101.3686939440. The cubic root of 1213013 is about 106.6485982850.

Adding to 1213013 its reverse (3103121), we get a palindrome (4316134).

The spelling of 1213013 in words is "one million, two hundred thirteen thousand, thirteen".

Divisors: 1 229 5297 1213013