1242558 has 12 divisors (see below), whose sum is σ = 2692248. Its totient is φ = 414180.

The previous prime is 1242517. The next prime is 1242569. The reversal of 1242558 is 8552421.

It is a happy number.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34498 + ... + 34533.

It is an arithmetic number, because the mean of its divisors is an integer number (224354).

2^1242558 is an apocalyptic number.

1242558 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1242558 is an abundant number, since it is smaller than the sum of its proper divisors (1449690).

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

1242558 is a wasteful number, since it uses less digits than its factorization.

1242558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69039 (or 69036 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 1242558 is about 1114.7008567324. The cubic root of 1242558 is about 107.5075314716.

Adding to 1242558 its reverse (8552421), we get a palindrome (9794979).

The spelling of 1242558 in words is "one million, two hundred forty-two thousand, five hundred fifty-eight".