1242648 has 64 divisors (see below), whose sum is σ = 3772800. Its totient is φ = 375840.

The previous prime is 1242643. The next prime is 1242739. The reversal of 1242648 is 8462421.

1242648 is a `hidden beast` number, since 12 + 4 + 2 + 648 = 666.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242641) 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, 2115 + ... + 2637.

It is an arithmetic number, because the mean of its divisors is an integer number (58950).

2^1242648 is an apocalyptic number.

1242648 is a gapful number since it is divisible by the number (18) 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 1242648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1886400).

1242648 is an abundant number, since it is smaller than the sum of its proper divisors (2530152).

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

1242648 is a wasteful number, since it uses less digits than its factorization.

1242648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 539 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 1242648 is about 1114.7412255766. The cubic root of 1242648 is about 107.5101270431.

It can be divided in two parts, 124 and 2648, that added together give a palindrome (2772).

The spelling of 1242648 in words is "one million, two hundred forty-two thousand, six hundred forty-eight".