1242188 has 6 divisors (see below), whose sum is σ = 2173836. Its totient is φ = 621092.

The previous prime is 1242181. The next prime is 1242191. The reversal of 1242188 is 8812421.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1242181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155270 + ... + 155277.

It is an arithmetic number, because the mean of its divisors is an integer number (362306).

2^1242188 is an apocalyptic number.

It is an amenable number.

1242188 is a deficient number, since it is larger than the sum of its proper divisors (931648).

1242188 is a wasteful number, since it uses less digits than its factorization.

1242188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310551 (or 310549 counting only the distinct ones).

The product of its digits is 1024, while the sum is 26.

The square root of 1242188 is about 1114.5348805668. The cubic root of 1242188 is about 107.4968594720.

The spelling of 1242188 in words is "one million, two hundred forty-two thousand, one hundred eighty-eight".