1231836 has 12 divisors (see below), whose sum is σ = 2874312. Its totient is φ = 410608.

The previous prime is 1231831. The next prime is 1231843. The reversal of 1231836 is 6381321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231831) 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, 51315 + ... + 51338.

It is an arithmetic number, because the mean of its divisors is an integer number (239526).

2^1231836 is an apocalyptic number.

It is an amenable number.

1231836 is an abundant number, since it is smaller than the sum of its proper divisors (1642476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231836 is a wasteful number, since it uses less digits than its factorization.

1231836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102660 (or 102658 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 1231836 is about 1109.8810747103. The cubic root of 1231836 is about 107.1974112021.

The spelling of 1231836 in words is "one million, two hundred thirty-one thousand, eight hundred thirty-six".