1244390 has 32 divisors (see below), whose sum is σ = 2652480. Its totient is φ = 411264.

The previous prime is 1244381. The next prime is 1244393. The reversal of 1244390 is 934421.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244393) 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 15 ways as a sum of consecutive naturals, for example, 1724 + ... + 2336.

It is an arithmetic number, because the mean of its divisors is an integer number (82890).

2^1244390 is an apocalyptic number.

1244390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1244390 is an abundant number, since it is smaller than the sum of its proper divisors (1408090).

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

1244390 is a wasteful number, since it uses less digits than its factorization.

1244390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1244390 is about 1115.5222991944. The cubic root of 1244390 is about 107.5603411009.

The spelling of 1244390 in words is "one million, two hundred forty-four thousand, three hundred ninety".