1242388 has 12 divisors (see below), whose sum is σ = 2484832. Its totient is φ = 532440.

The previous prime is 1242379. The next prime is 1242403. The reversal of 1242388 is 8832421.

1242388 is an admirable number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 44371 = 1242388 / (1 + 2 + 4 + 2 + 3 + 8 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22158 + ... + 22213.

2^1242388 is an apocalyptic number.

It is an amenable number.

1242388 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1242388 is a wasteful number, since it uses less digits than its factorization.

1242388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44382 (or 44380 counting only the distinct ones).

The product of its digits is 3072, while the sum is 28.

The square root of 1242388 is about 1114.6246004822. The cubic root of 1242388 is about 107.5026283835.

The spelling of 1242388 in words is "one million, two hundred forty-two thousand, three hundred eighty-eight".