1212861 has 16 divisors (see below), whose sum is σ = 1761984. Its totient is φ = 737664.

The previous prime is 1212857. The next prime is 1212877. The reversal of 1212861 is 1682121.

It is not a de Polignac number, because 1212861 - 2² = 1212857 is a prime.

It is a Curzon number.

1212861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5230 + ... + 5456.

It is an arithmetic number, because the mean of its divisors is an integer number (110124).

2^1212861 is an apocalyptic number.

It is an amenable number.

1212861 is a deficient number, since it is larger than the sum of its proper divisors (549123).

1212861 is a wasteful number, since it uses less digits than its factorization.

1212861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380.

The product of its digits is 192, while the sum is 21.

The square root of 1212861 is about 1101.2996867338. The cubic root of 1212861 is about 106.6441434649.

Adding to 1212861 its reverse (1682121), we get a palindrome (2894982).

The spelling of 1212861 in words is "one million, two hundred twelve thousand, eight hundred sixty-one".