1211013 has 12 divisors (see below), whose sum is σ = 1759680. Its totient is φ = 802536.

The previous prime is 1210999. The next prime is 1211027. The reversal of 1211013 is 3101121.

It is an interprime number because it is at equal distance from previous prime (1210999) and next prime (1211027).

It is not a de Polignac number, because 1211013 - 2⁶ = 1210949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1210986 and 1211004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211083) 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, 1870 + ... + 2432.

It is an arithmetic number, because the mean of its divisors is an integer number (146640).

2^1211013 is an apocalyptic number.

It is an amenable number.

1211013 is a deficient number, since it is larger than the sum of its proper divisors (548667).

1211013 is a wasteful number, since it uses less digits than its factorization.

1211013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 805 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1211013 is about 1100.4603582138. The cubic root of 1211013 is about 106.5899524362.

Adding to 1211013 its reverse (3101121), we get a palindrome (4312134).

It can be divided in two parts, 121101 and 3, that added together give a square (121104 = 348²).

The spelling of 1211013 in words is "one million, two hundred eleven thousand, thirteen".