1242450 has 72 divisors (see below), whose sum is σ = 3656016. Its totient is φ = 300000.

The previous prime is 1242421. The next prime is 1242457. The reversal of 1242450 is 542421.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1242457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4825 + ... + 5075.

It is an arithmetic number, because the mean of its divisors is an integer number (50778).

2^1242450 is an apocalyptic number.

1242450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1828008).

1242450 is an abundant number, since it is smaller than the sum of its proper divisors (2413566).

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

1242450 is a wasteful number, since it uses less digits than its factorization.

1242450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1242450 is about 1114.6524121896. The cubic root of 1242450 is about 107.5044166204.

Adding to 1242450 its reverse (542421), we get a palindrome (1784871).

The spelling of 1242450 in words is "one million, two hundred forty-two thousand, four hundred fifty".