1214640 has 120 divisors (see below), whose sum is σ = 4681248. Its totient is φ = 276480.

The previous prime is 1214639. The next prime is 1214641. The reversal of 1214640 is 464121.

1214640 is a `hidden beast` number, since 1 + 21 + 4 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (1214639) and next prime (1214641).

It is a tau number, because it is divible by the number of its divisors (120).

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 (1214641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4920 + ... + 5160.

2^1214640 is an apocalyptic number.

1214640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1214640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2340624).

1214640 is an abundant number, since it is smaller than the sum of its proper divisors (3466608).

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

1214640 is a wasteful number, since it uses less digits than its factorization.

1214640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1214640 is about 1102.1070728382. The cubic root of 1214640 is about 106.6962591505.

Adding to 1214640 its reverse (464121), we get a palindrome (1678761).

It can be divided in two parts, 121 and 4640, that added together give a square (4761 = 69²).

The spelling of 1214640 in words is "one million, two hundred fourteen thousand, six hundred forty".