1242120 has 64 divisors (see below), whose sum is σ = 4069440. Its totient is φ = 300800.

The previous prime is 1242119. The next prime is 1242121. The reversal of 1242120 is 212421.

It is an interprime number because it is at equal distance from previous prime (1242119) and next prime (1242121).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1242096 and 1242105.

It is not an unprimeable number, because it can be changed into a prime (1242121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 850 + ... + 1790.

It is an arithmetic number, because the mean of its divisors is an integer number (63585).

2^1242120 is an apocalyptic number.

1242120 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 1242120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2034720).

1242120 is an abundant number, since it is smaller than the sum of its proper divisors (2827320).

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

1242120 is a wasteful number, since it uses less digits than its factorization.

1242120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966 (or 962 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1242120 is about 1114.5043741502. The cubic root of 1242120 is about 107.4948979010.

Adding to 1242120 its reverse (212421), we get a palindrome (1454541).

The spelling of 1242120 in words is "one million, two hundred forty-two thousand, one hundred twenty".