1240812 has 24 divisors (see below), whose sum is σ = 3217200. Its totient is φ = 413568.

The previous prime is 1240807. The next prime is 1240817. The reversal of 1240812 is 2180421.

It is an interprime number because it is at equal distance from previous prime (1240807) and next prime (1240817).

It is a super-2 number, since 2×1240812² = 3079228838688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1240817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5637 + ... + 5852.

It is an arithmetic number, because the mean of its divisors is an integer number (134050).

2^1240812 is an apocalyptic number.

1240812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1240812 is an abundant number, since it is smaller than the sum of its proper divisors (1976388).

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

1240812 is a wasteful number, since it uses less digits than its factorization.

1240812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11502 (or 11494 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1240812 is about 1113.9174116603. The cubic root of 1240812 is about 107.4571525654.

The spelling of 1240812 in words is "one million, two hundred forty thousand, eight hundred twelve".